技术领域Technical Field
本发明涉及视光学仪器以及视力验光技术领域，尤其涉及一种视力检测用光学装置、视力检测系统及方法。The present invention relates to the field of optical instruments and vision optometry technology, and in particular to an optical device for vision detection, a vision detection system and a method.
背景技术Background technique
目前测试视力大多是用视力表，必须是在固定场所、较大空间和有标准视力表亮度的环境中，才能进行视力测试，现在，一般是在医院、眼镜店等场所。因为检测视力需要专门去固定场所，一般人们感觉视力可能有问题时，才去进行检测，这种被动的检测，导致视力已经出现问题了才去应对，而不能提前防控。如果视力检测能够不受限于特定环境、设施，而能够随时随地进行自我检测，那么在视力保护方面以及视力问题防控方面，都是一个非常有利的支持。Currently, vision tests are mostly conducted using eye charts, which must be performed in a fixed location, a large space, and an environment with standard eye chart brightness. Currently, vision tests are generally performed in hospitals, optical shops, and other places. Because vision tests require special visits to fixed locations, people generally only test when they feel that there may be problems with their vision. This passive testing results in vision problems being dealt with only after they have occurred, rather than being prevented and controlled in advance. If vision testing can be performed without being restricted to specific environments or facilities, and can be performed anytime and anywhere, it will be a very beneficial support in terms of vision protection and prevention and control of vision problems.
发明内容Summary of the invention
鉴于上述问题，提出了本发明以便提供一种克服上述问题或者至少部分地解决上述问题的技术方案。因此，本发明的一个方面，提供了一种视力检测用光学装置，所述光学装置为筒体状，一端用于与一只眼睛的周边部位接触，另一端设置有取景框，所述取景框用于贴合在智能终端屏幕上；筒体内设置有凹透镜；所述凹透镜与屏幕之间的距离为物距，所述凹透镜的焦距小于所述物距，凹透镜对智能终端屏幕上显示的视标图像成正立、缩小的虚像，对应每个视力值，在所述筒体一端对于所述凹透镜成的虚像的视觉效果相当于5m的视觉效果；取景框上设置有至少3个导体点，所述3个导体点不在一条直线上，用于能保证视标图像显示在取景框的正下方。In view of the above problems, the present invention is proposed to provide a technical solution to overcome the above problems or at least partially solve the above problems. Therefore, one aspect of the present invention provides an optical device for vision detection, the optical device is cylindrical, one end is used to contact the peripheral part of an eye, and the other end is provided with a viewfinder, the viewfinder is used to fit on the screen of the smart terminal; a concave lens is provided in the cylinder; the distance between the concave lens and the screen is the object distance, the focal length of the concave lens is less than the object distance, the concave lens forms an upright and reduced virtual image of the sight mark image displayed on the screen of the smart terminal, and corresponding to each vision value, the visual effect of the virtual image formed by the concave lens at one end of the cylinder is equivalent to the visual effect of 5m; at least 3 conductor points are provided on the viewfinder, and the 3 conductor points are not in a straight line, which is used to ensure that the sight mark image is displayed directly below the viewfinder.
本发明还提供一种利用前面所述的视力检测用光学装置的视力检测系统，该系统包括：The present invention also provides a vision detection system using the above-mentioned optical device for vision detection, the system comprising:
触点检测模块，用于检测所述至少三个导体点接触屏幕的位置信息；A contact point detection module, used to detect position information of the at least three conductor points contacting the screen;
视标图像显示校正模块，用于基于位置信息确定视标图像的显示位置；A sight mark image display correction module, used to determine the display position of the sight mark image based on the position information;
视标图像显示控制模块，用于根据所确定的显示位置按顺序显示与视力值对应的视标图像；The sight mark image display control module is used to display the sight mark images corresponding to the visual acuity values in sequence according to the determined display positions;
输入模块，用于接收用户输入；An input module, used for receiving user input;
视力分析模块，用于分析用户输入是否与所显示的视标图像的属性相匹配，如果匹配，则认为测试正确，否则认为测试错误；根据每个视力值对应的测试结果，确定视力值。The vision analysis module is used to analyze whether the user input matches the attributes of the displayed sight mark image. If it matches, the test is considered correct, otherwise it is considered wrong; the vision value is determined based on the test results corresponding to each vision value.
可选的，视标图像显示校正模块包括：Optionally, the sight mark image display correction module includes:
中心点确定单元，用于根据所述三个导体点接触屏幕的位置信息，确定三个导体点所构成的三角形的重心点；A center point determination unit, used to determine the center point of the triangle formed by the three conductor points according to the position information of the three conductor points contacting the screen;
视标图像中心点校正单元，用于基于所述重心点校准所述视标图像的中心点显示位置；A sight mark image center point correction unit, used for calibrating the center point display position of the sight mark image based on the center point;
视标图像显示方向校正单元，用于根据所述重心点以及一预定导体点对应的位置信息确定视标图像的正向标线显示位置；A sight mark image display direction correction unit, used to determine the positive mark line display position of the sight mark image according to the position information corresponding to the centroid point and a predetermined conductor point;
显示控制单元，用于基于校准的所述中心点显示位置、正向标线显示位置依序显示预先存储的视标图像。The display control unit is used to display the pre-stored sight mark images in sequence based on the calibrated center point display position and positive mark line display position.
可选的，所述视标图像的属性包括左、右、上、下。Optionally, the attributes of the sight mark image include left, right, top, and bottom.
可选的，所述视标图像显示控制模块按照视力值由低到高显示视标图像，对应每个视力值显示预定数量的视标图像。Optionally, the optotype image display control module displays optotype images according to the vision values from low to high, and displays a predetermined number of optotype images corresponding to each vision value.
可选的，所述视标图像显示控制模块按照用户的输入显示第一视标图像。Optionally, the optotype image display control module displays the first optotype image according to user input.
可选的，所述视标图像显示控制模块显示的第一视标图像为最低视力值对应的视标图像。Optionally, the first optotype image displayed by the optotype image display control module is an optotype image corresponding to the lowest vision value.
可选的，如果测试正确的次数达到预定阈值，所述视标图像显示控制模块控制显示第二视力值对应的视标图像，所述第二视力值高于第一视力值，重复执行，直到测试错误的次数达到预定阈值，所述视力分析模块输出之前对应的视力值。Optionally, if the number of correct tests reaches a predetermined threshold, the sight mark image display control module controls the display of the sight mark image corresponding to a second vision value, which is higher than the first vision value. The execution is repeated until the number of incorrect tests reaches a predetermined threshold, and the vision analysis module outputs the previous corresponding vision value.
可选的，如果测试错误的次数达到预定阈值，所述视标图像显示控制模块控制显示第二视力值对应的视标图像，所述第二视力值低于第一视力值，重复执行，直到测试正确的次数达到预定阈值，所述视力分析模块输出对应的视力值。Optionally, if the number of test errors reaches a predetermined threshold, the sight mark image display control module controls the display of the sight mark image corresponding to a second vision value, where the second vision value is lower than the first vision value, and the execution is repeated until the number of correct tests reaches a predetermined threshold, and the vision analysis module outputs the corresponding vision value.
本发明还提供一种利用前面所述的视力检测用光学装置的视力检测方法，该方法包括：The present invention also provides a method for detecting vision using the optical device for detecting vision described above, the method comprising:
检测所述至少三个导体点接触屏幕的位置信息；Detecting position information of the at least three conductor points contacting the screen;
基于位置信息确定视标图像的显示位置；Determining a display position of the sight mark image based on the position information;
根据所确定的显示位置按顺序显示与视力值对应的视标图像；Displaying sight mark images corresponding to the visual acuity values in order according to the determined display positions;
接收用户输入；Receive user input;
分析用户输入是否与所显示的视标图像的属性相匹配，如果匹配，则认为测试正确，否则认为测试错误；根据每个视力值对应的测试结果，确定视力值。Analyze whether the user input matches the attributes of the displayed sight mark image. If so, the test is considered correct, otherwise it is considered wrong. Determine the vision value based on the test results corresponding to each vision value.
可选的，基于位置信息确定视标图像的显示位置，包括下述步骤：Optionally, determining the display position of the sight mark image based on the position information includes the following steps:
根据所述三个导体点接触屏幕的位置信息，确定三个导体点所构成的三角形的重心点；Determine the centroid of the triangle formed by the three conductor points according to the position information of the three conductor points contacting the screen;
基于所述重心点校准所述视标图像的中心点显示位置；Calibrate the center point display position of the sight mark image based on the center point;
根据所述重心点以及一预定导体点对应的位置信息确定视标图像的正向标线显示位置；Determine the display position of the positive mark line of the sight mark image according to the position information corresponding to the center of gravity point and a predetermined conductor point;
基于校准的所述中心点显示位置、正向标线显示位置依序显示预先存储的视标图像。The pre-stored sight mark images are displayed in sequence based on the calibrated center point display position and positive mark line display position.
所述视标图像的属性包括左、右、上、下。The attributes of the sight mark image include left, right, top, and bottom.
按照视力值由低到高显示视标图像，对应每个视力值显示预定数量的视标图像。The sight mark images are displayed from low to high according to the vision value, and a predetermined number of sight mark images are displayed corresponding to each vision value.
按照用户的输入显示第一视标图像。The first optotype image is displayed according to the user's input.
显示的第一视标图像为最低视力值对应的视标图像。The first sight mark image displayed is the sight mark image corresponding to the lowest visual acuity value.
如果测试正确的次数达到预定阈值，控制显示第二视力值对应的视标图像，所述第二视力值高于第一视力值，重复执行，直到测试错误的次数达到预定阈值，输出之前对应的视力值。If the number of correct tests reaches a predetermined threshold, the control displays the visual mark image corresponding to the second vision value, which is higher than the first vision value. The execution is repeated until the number of incorrect tests reaches a predetermined threshold, and the corresponding vision value is output.
如果测试错误的次数达到预定阈值，控制显示第二视力值对应的视标图像，所述第二视力值低于第一视力值，重复执行，直到测试正确的次数达到预定阈值，输出对应的视力值。If the number of test errors reaches a predetermined threshold, the control displays a visual mark image corresponding to a second vision value, which is lower than the first vision value. Repeat the process until the number of correct tests reaches a predetermined threshold and the corresponding vision value is output.
本发明还提供一种存储介质，所述存储介质存储有计算机程序，所述计算机程序执行前面所述的方法。The present invention also provides a storage medium, wherein the storage medium stores a computer program, and the computer program executes the above-mentioned method.
本申请提供的技术方案，至少具有如下技术效果或优点：本申请提供的技术方案，至少具有如下技术效果或优点：视力检测用光学装置便于携带，结合广泛使用的智能终端运行对应的应用程序，可随时随地便宜地进行视力检测，而且检测过程标准，能够实现准确地视力检测，对于视力的管理（包括防控、监视）起到很好的支持作用。The technical solution provided by the present application has at least the following technical effects or advantages: The technical solution provided by the present application has at least the following technical effects or advantages: The optical device for vision detection is easy to carry, and can be combined with widely used smart terminals to run corresponding applications, so that vision detection can be performed cheaply anytime and anywhere, and the detection process is standardized, which can achieve accurate vision detection, and plays a good supporting role in vision management (including prevention, control, and monitoring).
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述技术方案和其目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above technical solution of the present invention and its objectives, features and advantages more obvious and easy to understand, the specific implementation methods of the present invention are listed below.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
图1a示出了本发明提供的第一实施方式的视力检测用光学装置的立体结构图；FIG. 1a shows a three-dimensional structural diagram of an optical device for vision detection according to a first embodiment of the present invention;
图1b到图1f示出了本发明提供的视力检测用光学装置的正视图，左视图，后视图、仰视图和俯视图；1b to 1f show a front view, a left side view, a rear view, a bottom view and a top view of the optical device for vision detection provided by the present invention;
图2示出了本发明提出的第一实施方式的视力检测用光学装置的光路图；FIG2 shows a light path diagram of an optical device for vision detection according to a first embodiment of the present invention;
图3a，3b示出了本发明提供的第二实施方式的视力检测用光学装置的立体结构图；3a and 3b show the three-dimensional structure diagram of the optical device for vision detection according to the second embodiment of the present invention;
图4示出了本发明提出的第二实施方式的视力检测用光学装置的光路图；FIG4 shows a light path diagram of an optical device for vision detection according to a second embodiment of the present invention;
图5a，5b，5c示出了本发明提供的第三实施方式的视力检测用光学装置的立体结构图、剖面图、侧视图；5a, 5b, and 5c show a three-dimensional structural diagram, a cross-sectional diagram, and a side view of an optical device for vision detection according to a third embodiment of the present invention;
图6示出了本发明提出的第三实施方式的视力检测用光学装置的光路图；FIG6 shows a light path diagram of an optical device for vision detection according to a third embodiment of the present invention;
图7示出了本发明提出的视力检测方法的流程图；FIG7 shows a flow chart of the vision detection method proposed by the present invention;
图8示出了视标图像的校正过程。FIG8 shows the calibration process of the sight mark image.
具体实施方式Detailed ways
下面将参照附图更详细地描述本发明的示例性实施例。虽然附图中显示了本发明的示例性实施例，然而应当理解，可以以各种形式实现本发明而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本发明，并且能够将本发明的范围完整的传达给本领域的技术人员。The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.
在《视力检查技术操作规范》中载明，视力表可选用对数视力表、国际标准视力表、ETDRS（早期治疗糖尿病性视网膜病变研究）视力表，前两种视力表的检查距离是5m，后者的检查距离是4m，因此现有的视力检查均要求宽敞的物理空间。《视力检查技术操作规范》中要求视力表的1.0一行应与被检眼同高，可是，一般视力表都是固定在墙上，而被检者身高不一，差距较大，在实际视力检查中，很难做到符合这项要求。《视力检查技术操作规范》还要求视力表的照明应均匀，无眩光，如果用人工照明，照明强度应为300-500lux，但现在很常见的是，在一个场所，尤其是视力产品或者视力相关产品的商业活动场所中，利用市场销售的一些纸质视力表进行视力检测，由于没有对照明强度进行检测检验，检测结果也非常容易不准确。The Technical Operation Specifications for Vision Examination states that the visual acuity chart can be a logarithmic visual acuity chart, an international standard visual acuity chart, or an ETDRS (Early Treatment Diabetic Retinopathy Study) visual acuity chart. The examination distance for the first two visual acuity charts is 5m, and the examination distance for the latter is 4m. Therefore, existing visual acuity examinations all require a spacious physical space. The Technical Operation Specifications for Vision Examination requires that the 1.0 line of the visual acuity chart should be at the same height as the eye being examined. However, visual acuity charts are generally fixed on the wall, and the heights of the examinees vary greatly. In actual visual acuity examinations, it is difficult to meet this requirement. The Technical Operation Specifications for Vision Examination also requires that the illumination of the visual acuity chart should be uniform and glare-free. If artificial lighting is used, the illumination intensity should be 300-500 lux. However, it is now common to use some paper visual acuity charts sold on the market for visual acuity testing in a venue, especially in commercial venues for visual acuity products or visual acuity-related products. Since the illumination intensity is not tested, the test results are also very likely to be inaccurate.
本发明旨在符合上述规范的基础上，提出了一种可不受限于物理空间，又能方便地、准确地进行视力检测的装置和方法。本发明中提供的视力检测用光学装置是一种独立的产品或者说设备。在进行视力检测时，需要与智能终端（比如智能手机）上运行的app配合使用。智能手机可提供稳定的视标图像背光亮度以及符合要求的视标图案。The present invention aims to meet the above specifications and proposes a device and method that can be used to test vision conveniently and accurately without being restricted by physical space. The optical device for vision testing provided in the present invention is an independent product or equipment. When performing vision testing, it is necessary to use it in conjunction with an app running on a smart terminal (such as a smart phone). The smart phone can provide a stable backlight brightness of the sight mark image and a sight mark pattern that meets the requirements.
本发明的一个方面，提供了一种视力检测用光学装置，所述光学装置为筒体状，一端用于与一只眼睛的周边部位接触，另一端设置有取景框，所述取景框用于贴合在智能终端屏幕上；筒体内设置有凹透镜；所述凹透镜与屏幕之间的距离为物距，所述凹透镜的焦距小于所述物距，凹透镜对智能终端屏幕上显示的视标图像成正立、缩小的虚像，对应每个视力值，在所述筒体一端对于所述凹透镜成的虚像的视觉效果相当于5m的视觉效果；取景框上设置有至少3个导体点，所述3个导体点不在一条直线上，用于能保证视标图像显示在取景框的正下方。该装置轻便小巧，可随身携带。One aspect of the present invention provides an optical device for vision detection, the optical device is cylindrical, one end of which is used to contact the peripheral part of an eye, and the other end is provided with a viewfinder, the viewfinder is used to fit on the screen of a smart terminal; a concave lens is provided in the cylinder; the distance between the concave lens and the screen is the object distance, the focal length of the concave lens is less than the object distance, the concave lens forms an upright and reduced virtual image of the sight mark image displayed on the screen of the smart terminal, corresponding to each vision value, the visual effect of the virtual image formed by the concave lens at one end of the cylinder is equivalent to the visual effect of 5m; at least 3 conductor points are provided on the viewfinder, the 3 conductor points are not in a straight line, and are used to ensure that the sight mark image is displayed directly below the viewfinder. The device is light and compact and can be carried around.
作为第一种实施方式，如图1a-f所示，该光学装置具有筒体1以及连接部件2，所述筒体一端设置有目镜3，该端部适于与眼部贴合；筒体下方另一端设置有取景框4，所述取景框的底层边缘上设置有至少三个导体点6、7、8，所述三个导体点的重心与取景框的中心重合；筒体内设置有凸透镜，所述凸透镜与屏幕之间的距离为物距，所述凸透镜的焦距大于所述物距，凸透镜成的虚像的视觉效果相当于5m的视觉效果。As a first embodiment, as shown in Figures 1a-f, the optical device has a barrel 1 and a connecting component 2, and an eyepiece 3 is provided at one end of the barrel, and the end is suitable for fitting with the eye; a viewfinder 4 is provided at the other end below the barrel, and at least three conductor points 6, 7, and 8 are provided on the bottom edge of the viewfinder, and the center of gravity of the three conductor points coincides with the center of the viewfinder; a convex lens is provided in the barrel, and the distance between the convex lens and the screen is the object distance, the focal length of the convex lens is greater than the object distance, and the visual effect of the virtual image formed by the convex lens is equivalent to the visual effect of 5m.
本发明提供的视力检测用光学装置利用了凸透镜的成像原理，如图2所示。凸透镜成像公式如下：The optical device for vision detection provided by the present invention utilizes the imaging principle of a convex lens, as shown in FIG2 . The imaging formula of a convex lens is as follows:
1/u+1/v=1/f1/u+1/v=1/f
其中u为物距，v为像距，f为焦距。Where u is the object distance, v is the image distance, and f is the focal length.
在本申请中，凸透镜与手机屏幕之间的距离为物距u，物距u小于焦距f，则在手机屏幕相对于凸透镜的一侧呈正立放大的虚像，在这种情况下，物距越小，像距越小，像也越小。凸透镜成的虚像的视觉效果相当于5m的视觉效果。根据筒体的长度、市场上的凸透镜的焦距参数，选择合适的凸透镜，凸透镜安装在筒体内，一般来说，靠近取景框的位置。从而通过有限长度的筒体实现了用户看到的视标图像的虚线的视觉距离可达到5米的技术效果。由于通过凸透镜，与智能终端同侧，成的是正立放大的虚像，因此智能终端上显示的视标图像是依据放大的倍数计算进行相应倍数缩小后的视标图像。In the present application, the distance between the convex lens and the mobile phone screen is the object distance u, and the object distance u is less than the focal length f, then a virtual image that is erected and enlarged is formed on the side of the mobile phone screen relative to the convex lens. In this case, the smaller the object distance, the smaller the image distance, and the smaller the image. The visual effect of the virtual image formed by the convex lens is equivalent to the visual effect of 5m. According to the length of the barrel and the focal length parameters of the convex lens on the market, a suitable convex lens is selected, and the convex lens is installed in the barrel, generally speaking, close to the position of the viewfinder. Thereby, the technical effect that the visual distance of the dotted line of the sight mark image seen by the user can reach 5 meters is achieved through a barrel of limited length. Since the convex lens forms an erect and enlarged virtual image on the same side as the smart terminal, the sight mark image displayed on the smart terminal is the sight mark image after the corresponding multiple reduction is calculated based on the magnification multiple.
作为第二种实施方式，本发明的一个方面，提供了一种视力检测用光学装置，如图3a，3b所示，该装置具有筒体1以及连接部件2，所述筒体一端设置有目镜3，该端部适于与眼部贴合；筒体下方另一端设置有取景框4，所述取景框的底层边缘上设置有至少三个导体点6、7、8，所述三个导体点的重心与取景框的中心重合；筒体内设置有凹透镜；所述连接部件2用于将所述筒体1固定在一智能终端上，取景框4与所述智能终端的屏幕贴合；所述凹透镜与屏幕之间的距离为物距，所述凹透镜的焦距大于所述物距，像距与所述筒体一端到所述凹透镜的距离之和为视力测定规定距离。As a second embodiment, one aspect of the present invention provides an optical device for vision detection, as shown in Figures 3a and 3b, the device comprises a barrel 1 and a connecting component 2, an eyepiece 3 is provided at one end of the barrel, and the end is suitable for fitting with the eye; a viewfinder 4 is provided at the other end below the barrel, and at least three conductor points 6, 7, and 8 are provided on the bottom edge of the viewfinder, and the center of gravity of the three conductor points coincide with the center of the viewfinder; a concave lens is provided in the barrel; the connecting component 2 is used to fix the barrel 1 on a smart terminal, and the viewfinder 4 fits with the screen of the smart terminal; the distance between the concave lens and the screen is the object distance, the focal length of the concave lens is greater than the object distance, and the sum of the image distance and the distance from one end of the barrel to the concave lens is the specified distance for vision measurement.
凹透镜的成像原理，如图4所示，物距在焦距内时，在物相对于凹透镜的同侧可成缩小的正立虚像，实像的像距小于物距，即正立虚像到凹透镜的距离小于凹透镜到屏幕的距离。物距等于焦距时，像距无穷远。本发明利用上述原理，将凹透镜装设在筒体内靠近取景框的一端。通过选择合适焦距的凹透镜，并调整凹透镜与取景框之间的距离，即物距，使得凹透镜成的虚像的视觉效果相当于5m的视觉效果。将凹透镜的物距记为u，像距记为v，焦距记为f，则三者具有如下关系：The imaging principle of the concave lens is shown in Figure 4. When the object distance is within the focal length, a reduced erect virtual image can be formed on the same side of the object relative to the concave lens, and the image distance of the real image is smaller than the object distance, that is, the distance from the erect virtual image to the concave lens is smaller than the distance from the concave lens to the screen. When the object distance is equal to the focal length, the image distance is infinite. The present invention utilizes the above principle and installs the concave lens in the cylinder at one end close to the viewfinder. By selecting a concave lens with a suitable focal length and adjusting the distance between the concave lens and the viewfinder, that is, the object distance, the visual effect of the virtual image formed by the concave lens is equivalent to the visual effect of 5m. Let the object distance of the concave lens be u, the image distance be v, and the focal length be f, then the three have the following relationship:
1/u+1/v=1/f1/u+1/v=1/f
通过对智能终端上显示的视标图像进行缩小，得到上述《视力检查技术操作规范》中规定的视标图像，因此在智能终端上显示的视标图像比规范的视标图像大。虚像对人眼可见，使人感觉就像是看到的实际图像，借助缩小的虚像通过有限长度的筒体实现了用户所看到的视标图像的虚像的视觉距离可达到5 米的技术效果。The sight mark image specified in the above-mentioned "Technical Operation Specifications for Vision Examination" is obtained by reducing the sight mark image displayed on the smart terminal, so the sight mark image displayed on the smart terminal is larger than the standard sight mark image. The virtual image is visible to the human eye, making people feel like they are seeing the actual image. With the help of the reduced virtual image through the limited length of the cylinder, the visual distance of the virtual image of the sight mark image seen by the user can reach 5 meters.
作为第三种实施方式，如图5a、5b，5c所示，该装置具有筒体1以及连接部件2，所述筒体一端设置有目镜3，该端部适于与眼部贴合；筒体下方另一端设置有取景框4，所述取景框的底层边缘上设置有至少三个导体点，所述三个导体点的重心与取景框的中心重合；筒体内具有至少两对平面镜5，平面镜与水平面呈45度角，每对平面镜的镜面相对，呈90度角；所述连接部件2用于将所述筒体1固定在一智能终端上10，取景框4与所述智能终端10的屏幕贴合；所述筒体1所成的镜像相当于5m的视觉效果。As a third embodiment, as shown in Figures 5a, 5b, and 5c, the device has a barrel 1 and a connecting component 2, and an eyepiece 3 is provided at one end of the barrel, and the end is suitable for fitting with the eye; a viewfinder 4 is provided at the other end below the barrel, and at least three conductor points are provided on the bottom edge of the viewfinder, and the center of gravity of the three conductor points coincides with the center of the viewfinder; there are at least two pairs of plane mirrors 5 in the barrel, and the plane mirrors are at a 45-degree angle to the horizontal plane, and the mirror surfaces of each pair of plane mirrors are opposite to each other at an angle of 90 degrees; the connecting component 2 is used to fix the barrel 1 on a smart terminal 10, and the viewfinder 4 is in contact with the screen of the smart terminal 10; the mirror image formed by the barrel 1 is equivalent to a visual effect of 5m.
本发明提供的视力检测用光学装置与潜望镜的结构有些相似，但潜望镜是利用平面镜的反射原理改变了光线传播的方向，从而在水下可以看到水面上的情况。而本发明中利用平面镜成的虚像有增大视觉距离的特点。从而通过有限长度的筒体实现了用户看到的视标图像的虚像的视觉距离可达到5米的技术效果。The optical device for vision detection provided by the present invention is somewhat similar to the structure of a periscope, but the periscope uses the reflection principle of a plane mirror to change the direction of light propagation, so that the situation on the water surface can be seen underwater. The virtual image formed by the plane mirror in the present invention has the characteristic of increasing the visual distance. Therefore, the technical effect of achieving a visual distance of 5 meters for the virtual image of the sight mark image seen by the user through a limited length cylinder is achieved.
为了整个视力检测用光学装置整体更加小巧，筒体的尺寸更加小，筒体为可伸缩结构。In order to make the entire optical device for vision detection more compact, the size of the cylinder is smaller and the cylinder is a retractable structure.
在使用时，人的一只眼睛贴紧筒体一端，向里看，为了使得眼睛更好地与筒体一端贴合，所述筒体一端优选为喇叭形。When in use, one eye of a person is pressed against one end of the cylinder body and looks inward. In order to make the eye fit better with the one end of the cylinder body, the one end of the cylinder body is preferably trumpet-shaped.
为了避免灰尘或者其他东西落入桶内，弄脏平面镜、筒体内部，在筒体内靠近该端处设置有目镜，可以选择平面透明玻璃作为目镜，为了方便清洁目镜靠近人眼一侧的表面，目镜要安置在靠近所述筒体一端的位置，所述目镜距离所述筒体一端预定距离，不能设置在太深的地方。In order to prevent dust or other things from falling into the barrel and dirtying the plane mirror and the inside of the cylinder, an eyepiece is provided near the end of the cylinder. A flat transparent glass can be selected as the eyepiece. In order to facilitate cleaning of the surface of the eyepiece close to the human eye, the eyepiece should be placed near one end of the cylinder. The eyepiece is a predetermined distance away from the end of the cylinder and cannot be set too deep.
作为第一种实施方式，如图5b所示，筒体内设置两对平面镜，第一对平面镜设置在筒体上端，而第二对平面镜设置在筒体下端，即光线在筒体内由取景框投射到筒体上端的第一平面镜上，经过第一平面镜发射到筒体上端的第二平面镜上，再经过第二平面镜投射到筒体下部的第三平面镜上，由第三平面镜反射到第四平面镜上，再投射到筒体上端的目镜上，通过透射到达被测者眼睛。通过这种光路的设计，使得被测者看到的虚像是距离被测试者较远的距离，从而实现规定的测试距离。As a first embodiment, as shown in FIG5b, two pairs of plane mirrors are arranged in the cylinder, the first pair of plane mirrors are arranged at the upper end of the cylinder, and the second pair of plane mirrors are arranged at the lower end of the cylinder, that is, the light is projected from the viewfinder in the cylinder to the first plane mirror at the upper end of the cylinder, emitted to the second plane mirror at the upper end of the cylinder through the first plane mirror, and then projected to the third plane mirror at the lower part of the cylinder through the second plane mirror, reflected to the fourth plane mirror by the third plane mirror, and then projected to the eyepiece at the upper end of the cylinder, and reaches the eyes of the subject through transmission. Through the design of this optical path, the virtual image seen by the subject is at a distance far from the subject, thereby achieving the specified test distance.
作为第二种平面镜的布局方式，借鉴潜望镜的结构，筒体包括至少两个直角弯，平面镜设置在筒体的直角弯处，平面镜与水平面呈45度角。光路图如图6所示。由图6可看到，眼睛看到的通过平面镜两次反射呈现的虚线的距离是a+b+c，从而实现规定的视力测试距离。借鉴潜望镜的结构，平面镜设置在筒体的直角弯处，平面镜与水平面呈45度角。光路图如图6所示。由图6可看到，眼睛看到的通过平面镜两次反射呈现的虚线的距离是a+b+c，从而实现规定的视力测试距离。As a second layout of the plane mirror, the structure of the periscope is referenced, and the cylinder includes at least two right-angle bends. The plane mirror is arranged at the right-angle bend of the cylinder, and the plane mirror is at a 45-degree angle to the horizontal plane. The optical path diagram is shown in Figure 6. It can be seen from Figure 6 that the distance between the dotted lines reflected twice by the plane mirror seen by the eye is a+b+c, thereby achieving the prescribed vision test distance. Referring to the structure of the periscope, the plane mirror is arranged at the right-angle bend of the cylinder, and the plane mirror is at a 45-degree angle to the horizontal plane. The optical path diagram is shown in Figure 6. It can be seen from Figure 6 that the distance between the dotted lines reflected twice by the plane mirror seen by the eye is a+b+c, thereby achieving the prescribed vision test distance.
因为人眼看到的虚像是平面镜反射形成的虚像，为了避免因为玻璃的折射导致的图像边缘不清晰，本发明优选使用表面镜作为平面反射镜。表面镜的使用可以很好的避免玻璃对入射光线的折射，而且由于表面镜设置在筒体内，不会有灰尘进入，能够保持表面镜镜面的干净不磨损。Because the virtual image seen by the human eye is a virtual image formed by reflection of a plane mirror, in order to avoid unclear image edges caused by refraction of glass, the present invention preferably uses a surface mirror as a plane reflector. The use of a surface mirror can well avoid the refraction of incident light by glass, and because the surface mirror is arranged in the cylinder, dust will not enter, and the surface mirror surface can be kept clean and not worn.
视力检测用光学装置另一端设置有取景框4、连接部件2，通过连接部件2，筒体固定在手机屏幕上，而且实现取景框与手机屏幕贴合。The other end of the optical device for vision detection is provided with a viewfinder 4 and a connecting component 2. Through the connecting component 2, the cylinder is fixed on the mobile phone screen, and the viewfinder is fitted to the mobile phone screen.
使用时，首先打开智能终端上的视力检测app后，再将视力检测用光学装置通过连接装置固定在智能终端屏幕上。智能终端采集所述至少三个导体点的位置，基于所述导体点的位置确定预先存储的视标图像的显示位置，并进行视标图像的显示。When in use, first open the vision detection app on the smart terminal, and then fix the vision detection optical device on the screen of the smart terminal through the connecting device. The smart terminal collects the positions of the at least three conductor points, determines the display position of the pre-stored sight mark image based on the positions of the conductor points, and displays the sight mark image.
由于所述视力检测用光学装置与智能终端上的app配合使用，需要使得智能终端屏幕上显示的视标图像刚好显示在视力检测用光学装置的取景框内。视力检测用光学装置固定在屏幕上时，固定在屏幕上的位置是难以准确固定的，但屏幕上的视标图像需要显示在视景框内。在本发明中，通过在取景框上设置不在一条直线的三个导体点，在取景框固定并且贴合在智能终端屏幕上时，智能终端可检测并识别到这三个导体点，从而智能终端根据所检测到的三个导体点的位置校正所显示的视标图像的位置，再进行视力检测过程。Since the optical device for vision detection is used in conjunction with an app on a smart terminal, it is necessary to make the sight mark image displayed on the screen of the smart terminal appear exactly within the viewfinder of the optical device for vision detection. When the optical device for vision detection is fixed on the screen, it is difficult to accurately fix the position on the screen, but the sight mark image on the screen needs to be displayed within the viewfinder. In the present invention, by setting three conductor points that are not in a straight line on the viewfinder, when the viewfinder is fixed and attached to the screen of the smart terminal, the smart terminal can detect and identify the three conductor points, so that the smart terminal corrects the position of the displayed sight mark image according to the positions of the three detected conductor points, and then performs the vision detection process.
如图7所示，利用前面所述的视力检测用光学装置的视力检测方法，由智能终端执行软件程序来实现，该软件程序可以是app程序，也可以是浏览器程序，包括下述步骤：As shown in FIG. 7 , the vision detection method using the aforementioned optical device for vision detection is implemented by executing a software program by a smart terminal. The software program may be an app program or a browser program, and includes the following steps:
S1.检测所述至少三个导体点接触屏幕的位置信息；S1. Detecting the position information of at least three conductor points contacting the screen;
S2.基于位置信息确定视标图像的显示位置；S2. Determine the display position of the sight mark image based on the position information;
S3. 根据所确定的显示位置按顺序显示与视力值对应的视标图像；S3. Displaying the sight mark images corresponding to the visual acuity values in sequence according to the determined display position;
S4.接收用户输入；S4. Receive user input;
S5.分析用户输入是否与所显示的视标图像的属性相匹配，如果匹配，则认为测试正确，否则认为测试错误；根据每个视力值对应的测试结果，确定视力值。S5. Analyze whether the user input matches the attributes of the displayed sight mark image. If so, the test is considered correct; otherwise, the test is considered wrong. Determine the vision value based on the test results corresponding to each vision value.
基于该视力测试方法，可以自动获得视力测试结果，而且利用常见的智能手机或者其他智能终端即可实现，视力地测试只需要一个光学装置配合通过智能手机执行应用程序即可完成，而且测试结果可保存，便于前后进行视力比较，为调整用眼情况提供数据支持。Based on this vision testing method, the vision test results can be automatically obtained, and it can be achieved using a common smart phone or other smart terminal. The vision test only requires an optical device to be completed by executing an application on a smart phone, and the test results can be saved to facilitate vision comparison before and after, providing data support for adjusting eye conditions.
所述步骤S2基于位置信息确定视标图像的显示位置，如图8所示，具体包括下述过程：The step S2 determines the display position of the sight mark image based on the position information, as shown in FIG8 , and specifically includes the following process:
S21.根据所述三个导体点接触屏幕的位置信息，确定三个导体点所构成的三角形的重心点；S21. Determine the centroid of the triangle formed by the three conductor points according to the position information of the three conductor points contacting the screen;
S22.基于所述重心点校准所述视标图像的中心点显示位置，至少一幅视标图像具有中心点信息、正向标线信息；S22. Calibrate the center point display position of the sight mark image based on the center point, at least one sight mark image has center point information and positive mark line information;
S23.根据所述重心点以及一预定导体点对应的位置信息确定视标图像的正向标线显示位置；S23. Determine the positive mark line display position of the sight mark image according to the position information corresponding to the center of gravity point and a predetermined conductor point;
S24.基于校准的所述中心点显示位置、正向标线显示位置依序显示预先存储的视标图像。S24. Displaying pre-stored sight mark images in sequence based on the calibrated center point display position and positive mark line display position.
通过上述步骤，只要将取景框放置在智能终端的屏幕上，就能保证视标图像显示在取景框的正下方，从而对于取景框的放置没有任何限制，方便操作使用。由上述校正过程可以看出，为了简化重心位置的计算过程，作为一种最优实施方式，所述三个导体点构成等边三角形，作为另一种最优实施方式，所述三个导体点构成等边三角形以外的等腰三角形。Through the above steps, as long as the viewfinder is placed on the screen of the smart terminal, it can be ensured that the sight mark image is displayed directly below the viewfinder, so there is no restriction on the placement of the viewfinder, which is convenient for operation. It can be seen from the above correction process that in order to simplify the calculation process of the center of gravity position, as an optimal implementation, the three conductor points form an equilateral triangle, and as another optimal implementation, the three conductor points form an isosceles triangle other than the equilateral triangle.
作为视标图像显示的第二种校正方式，校正过程包括如下步骤：As the second correction method for the sight mark image display, the correction process includes the following steps:
确定第一导体点与第二导体点所在的直线；Determine a straight line where the first conductor point and the second conductor point are located;
将所述直线与视标图像的定位基准线对准，至少一幅视标图像具有定位基准线、定位基准点信息；Aligning the straight line with the positioning reference line of the sight mark image, at least one sight mark image having the positioning reference line and positioning reference point information;
将第三导体点与所述定位基准点进行对准；Aligning the third conductor point with the positioning reference point;
根据对准结果依序显示预先存储的视标图像。The pre-stored sight mark images are displayed in sequence according to the alignment results.
在该校正方式中，进行基准线的校准、基准点的校准前后顺序不做限定。In this calibration method, the order of performing the calibration of the reference line and the calibration of the reference point is not limited.
作为视标图像显示的第三种校正方式，校正过程包括如下步骤：As the third correction method for the sight mark image display, the correction process includes the following steps:
采集导体点位置，并确定出第一导体点、第二导体点、第三导体点；Collecting conductor point positions, and determining a first conductor point, a second conductor point, and a third conductor point;
将所述视标图像的第一定位基准点与第一导体点进行匹配，对应每幅视标图像，均存储有三个定位基准点；Matching the first positioning reference point of the sight mark image with the first conductor point, and storing three positioning reference points for each sight mark image;
将所述视标图像的第二定位基准点、第三基准点分别与第二导体点、第三导体点进行匹配；Matching the second positioning reference point and the third reference point of the sight mark image with the second conductor point and the third conductor point respectively;
基于三点匹配结果，依序显示预先存储的视标图像。Based on the three-point matching results, pre-stored visual mark images are displayed in sequence.
在校正好视标图像的显示位置以及显示方向后，可发出语音提示或着其他提示音，进入视力测试过程，即开始执行步骤S3。After the display position and display direction of the sight mark image are calibrated, a voice prompt or other prompt sound may be issued to enter the vision test process, that is, start executing step S3.
按照视力值由低到高显示视标图像，对应每个视力值显示预定数量的视标图像。所述视标图像的属性包括左、右、上、下。The optotype images are displayed from low to high according to the vision value, and a predetermined number of optotype images are displayed corresponding to each vision value. The attributes of the optotype images include left, right, top, and bottom.
可根据用户的输入的视力值显示对应类别的视标图像作为第一视标图像，也可按照程序默认显示与最低视力值对应的视标图像作为第一视标图像。The visual mark image of the corresponding category can be displayed as the first visual mark image according to the visual acuity value input by the user, or the visual mark image corresponding to the lowest visual acuity value can be displayed as the first visual mark image by default according to the program.
测验分析过程中，执行如下步骤：During the test analysis process, the following steps are performed:
S4.接收用户输入；S4. Receive user input;
S5.分析用户输入是否与所显示的视标图像的属性相匹配，如果匹配，则认为测试正确，否则认为测试错误；根据每个视力值对应的测试结果，确定视力值。S5. Analyze whether the user input matches the attributes of the displayed sight mark image. If so, the test is considered correct; otherwise, the test is considered wrong. Determine the vision value based on the test results corresponding to each vision value.
如果按照用户的输入视力值显示第一视标图像，那么在S5中，如果测试正确的次数达到预定阈值，控制显示第二视力值对应的视标图像，所述第二视力值高于第一视力值，重复执行，直到测试错误的次数达到预定阈值，输出之前对应的视力值作为视力测验结果。如果测试错误的次数达到预定阈值，控制显示第二视力值对应的视标图像，所述第二视力值低于第一视力值，重复执行，直到测试正确的次数达到预定阈值，输出对应的视力值。If the first sight mark image is displayed according to the user's input vision value, then in S5, if the number of correct tests reaches a predetermined threshold, the sight mark image corresponding to the second vision value is controlled to be displayed, and the second vision value is higher than the first vision value, and the execution is repeated until the number of test errors reaches a predetermined threshold, and the corresponding vision value is output as the vision test result. If the number of test errors reaches a predetermined threshold, the sight mark image corresponding to the second vision value is controlled to be displayed, and the second vision value is lower than the first vision value, and the execution is repeated until the number of correct tests reaches a predetermined threshold, and the corresponding vision value is output.
如果按照默认最低视力值显示第一视标图像，那么那么在S5中，如果测试正确的次数达到预定阈值，控制显示第二视力值对应的视标图像，所述第二视力值高于第一视力值，重复执行，直到测试错误的次数达到预定阈值，输出之前对应的视力值作为视力测验结果。If the first sight mark image is displayed according to the default minimum vision value, then in S5, if the number of correct tests reaches a predetermined threshold, the sight mark image corresponding to the second vision value is controlled to be displayed, and the second vision value is higher than the first vision value. The execution is repeated until the number of incorrect tests reaches a predetermined threshold, and the corresponding vision value is output as the vision test result.
在本发明中，视标图像按照对应的视力值分类预先存储，每幅视标图像对应存储有图像属性信息，所述视标图像的属性包括左、右、上、下。用户可通过语音进行输入，智能终端通过识别、分析语音确定用户输入的是左、右、上或者下。用户也可通过视力检测用光学装置筒体上的按键实现，按键信息通过无线方式发送到智能终端，这就需要筒体上设置4个按键，而且按键连接无线通信模块，接收按键信号。In the present invention, the sight mark images are stored in advance according to the corresponding vision values, and each sight mark image stores image attribute information, and the attributes of the sight mark image include left, right, up, and down. The user can input through voice, and the intelligent terminal determines whether the user input is left, right, up, or down by recognizing and analyzing the voice. The user can also use the buttons on the barrel of the optical device for vision detection, and the button information is sent to the intelligent terminal wirelessly, which requires 4 buttons to be set on the barrel, and the buttons are connected to the wireless communication module to receive the button signal.
视标图像的显示在一个视力值范围可随机显示，也可按照预定顺序显示。app运行的过程中，智能终端在检测到所述三个导体点后，才进行视标图像显示位置的校正以及进行视标图像的显示，不通过视力检测用光学装置是无法看到视标图像的，通过本发明提出的视力检测用光学装置和方法，能够避免对视力检测结果弄虚作假。The display of the sight mark image can be displayed randomly within a range of vision values or in a predetermined order. During the operation of the app, the smart terminal corrects the display position of the sight mark image and displays the sight mark image only after detecting the three conductor points. The sight mark image cannot be seen without the optical device for vision detection. The optical device and method for vision detection proposed by the present invention can avoid falsification of the vision detection result.
本发明还提供一种利用前面所述的视力检测用光学装置的视力检测系统，该系统可通过智能手机实现，该系统包括：The present invention also provides a vision detection system using the aforementioned optical device for vision detection, which can be implemented by a smart phone, and comprises:
触点检测模块，用于检测所述至少三个导体点接触屏幕的位置信息；A contact point detection module, used to detect position information of the at least three conductor points contacting the screen;
视标图像显示校正模块，用于基于位置信息确定视标图像的显示位置；A sight mark image display correction module, used to determine the display position of the sight mark image based on the position information;
视标图像显示控制模块，用于根据所确定的显示位置按顺序显示与视力值对应的视标图像；The sight mark image display control module is used to display the sight mark images corresponding to the visual acuity values in sequence according to the determined display positions;
输入模块，用于接收用户输入；An input module, used for receiving user input;
视力分析模块，用于分析用户输入是否与所显示的视标图像的属性相匹配，如果匹配，则认为测试正确，否则认为测试错误；根据每个视力值对应的测试结果，确定视力值。The vision analysis module is used to analyze whether the user input matches the attributes of the displayed sight mark image. If it matches, the test is considered correct, otherwise it is considered wrong; the vision value is determined based on the test results corresponding to each vision value.
具体地，视标图像显示校正模块包括：Specifically, the sight mark image display correction module includes:
中心点确定单元，用于根据所述三个导体点接触屏幕的位置信息，确定三个导体点所构成的三角形的重心点；A center point determination unit, used to determine the center point of the triangle formed by the three conductor points according to the position information of the three conductor points contacting the screen;
视标图像中心点校正单元，用于基于所述重心点校准所述视标图像的中心点显示位置；A sight mark image center point correction unit, used for calibrating the center point display position of the sight mark image based on the center point;
视标图像显示方向校正单元，用于根据所述重心点以及一预定导体点对应的位置信息确定视标图像的正向标线显示位置；A sight mark image display direction correction unit, used to determine the positive mark line display position of the sight mark image according to the position information corresponding to the centroid point and a predetermined conductor point;
显示控制单元，用于基于校准的所述中心点显示位置、正向标线显示位置依序显示预先存储的视标图像。The display control unit is used to display the pre-stored sight mark images in sequence based on the calibrated center point display position and positive mark line display position.
所述视标图像显示控制模块按照视力值由低到高显示视标图像，对应每个视力值显示预定数量的视标图像。The optotype image display control module displays optotype images according to the vision value from low to high, and displays a predetermined number of optotype images corresponding to each vision value.
所述视标图像显示控制模块按照用户的输入显示第一视标图像，或者所述视标图像显示控制模块显示的第一视标图像为最低视力值对应的视标图像。The optotype image display control module displays the first optotype image according to the user's input, or the first optotype image displayed by the optotype image display control module is an optotype image corresponding to the minimum vision value.
如果按照用户的输入视力值显示第一视标图像，如果测试正确的次数达到预定阈值，视力分析模块控制显示第二视力值对应的视标图像，所述第二视力值高于第一视力值，重复执行，直到测试错误的次数达到预定阈值，输出之前对应的视力值作为视力测验结果。如果测试错误的次数达到预定阈值，视力分析模块控制显示第二视力值对应的视标图像，所述第二视力值低于第一视力值，重复执行，直到测试正确的次数达到预定阈值，输出对应的视力值。If the first sight image is displayed according to the user's input vision value, if the number of correct tests reaches a predetermined threshold, the vision analysis module controls the display of the sight image corresponding to the second vision value, the second vision value is higher than the first vision value, and the execution is repeated until the number of test errors reaches a predetermined threshold, and the corresponding vision value is output as the vision test result. If the number of test errors reaches a predetermined threshold, the vision analysis module controls the display of the sight image corresponding to the second vision value, the second vision value is lower than the first vision value, and the execution is repeated until the number of correct tests reaches a predetermined threshold, and the corresponding vision value is output.
如果按照默认最低视力值显示第一视标图像，如果测试正确的次数达到预定阈值，视力分析模块控制显示第二视力值对应的视标图像，所述第二视力值高于第一视力值，重复执行，直到测试错误的次数达到预定阈值，视力分析模块输出之前对应的视力值作为视力测验结果。If the first sight mark image is displayed according to the default minimum vision value, if the number of correct tests reaches a predetermined threshold, the vision analysis module controls the display of the sight mark image corresponding to the second vision value, which is higher than the first vision value. The execution is repeated until the number of test errors reaches a predetermined threshold, and the vision analysis module outputs the previous corresponding vision value as the vision test result.
本发明还提供一种存储介质，所述存储介质存储有计算机程序，所述计算机程序执行前面所述的方法。The present invention also provides a storage medium, wherein the storage medium stores a computer program, and the computer program executes the above-mentioned method.
本申请提供的技术方案，至少具有如下技术效果或优点：本申请提供的技术方案，至少具有如下技术效果或优点：视力检测用光学装置便于携带，结合广泛使用的智能终端运行视力检测方法相关应用程序，可随时随地便宜地进行视力检测，而且检测过程标准，能够实现准确地视力检测，对于视力的管理（包括防控、监视）起到很好的支持作用。The technical solution provided by the present application has at least the following technical effects or advantages: The technical solution provided by the present application has at least the following technical effects or advantages: The optical device for vision detection is easy to carry, and can be combined with widely used smart terminals to run applications related to vision detection methods, so that vision detection can be performed cheaply anytime and anywhere, and the detection process is standardized, which can achieve accurate vision detection, and plays a good supporting role in vision management (including prevention, control, and monitoring).
在此处所提供的说明书中，说明了大量具体细节。然而，能够理解，本发明的实施例可以在没有这些具体细节的情况下实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.
类似地，应当理解，为了精简本发明并帮助理解各个发明方面中的一个或多个，在上面对本发明的示例性实施例的描述中，本发明的各个特征有时被一起分组到单个实施例、图、或者对其的描述中。然而，并不应将该公开的方法解释成反映如下意图：即所要求保护的本发明要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说，如下面的权利要求书所反映的那样，发明方面在于少于前面公开的单个实施例的所有特征。因此，遵循具体实施方式的权利要求书由此明确地并入该具体实施方式，其中每个权利要求本身都作为本发明的单独实施例。Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: that the claimed invention requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.
应该注意的是上述实施例对本发明进行说明而不是对本发明进行限制，并且本领域技术人员在不脱离所附权利要求的范围的情况下可设计出替换实施例。在权利要求中，不应将位于括号之间的任何参考符号构造成对权利要求的限制。It should be noted that the above embodiments illustrate the present invention rather than limit the present invention, and those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation to the claims.
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