Amonocle is a type ofcorrective lens used to correct or enhance thevisual perception in only oneeye. It consists of a circularlens placed in front of the eye and held in place by theeye socket itself. Often, to avoid losing the monocle, a string or wire is connected to the wearer's clothing at one end and, at the other end, to either a hole in the lens or, more often, a wire ring around its circumference.
The PrussianantiquarianPhilipp von Stosch wore a monocle in Rome in the 1720s, in order to closely examineengravings and antiqueengraved gems, but the monocle did not become an article of gentlemen's apparel until the 19th century. Thedandy'squizzing glass of the 1790s was an article of high fashion,[1] which differs from the monocle in being held to one's eye with a handle in a fashion similar to alorgnette, rather than being held in place by the eye socket itself.
There are three additional styles of the monocle. The first style consists of a simple loop of metal with a lens that was slotted into the eyeorbit. These were the first monocles worn in England and could be found from the 1830s onwards. The second style, which was developed in the 1890s, was the most elaborate, consisting of a frame with a raised edge-like extension known as thegallery.[2] The gallery was designed to help secure the monocle in place by raising it out of the eye's orbit slightly so that the eyelashes would not jar it. Monocles with galleries were often the most expensive. The wealthy would have the frames custom-made to fit their eye sockets. A sub-category of the galleried monocle was the "sprung gallery", where the gallery was replaced by an incomplete circle of flattened, ridged wire supported by three posts. The ends were pulled together, the monocle was placed in the eye orbit, and the ends were released, causing the gallery to spring out and keep the monocle in place.The third style of monocle was frameless. This consisted of a cut piece of glass, with a serrated edge to provide a grip and sometimes a hole drilled into one side for a cord. Often the frameless monocle had no cord and would be worn freely. This style was popular at the beginning of the 20th century as the lens could be cut to fit any shape eye orbit inexpensively, without the cost of a customized frame.
If customized, monocles can be worn securely with little effort.[citation needed] However, periodic adjustment is common for monocle wearers to keep the monocle from popping. Often only the rich could afford to have a monocle custom-fabricated, while the poor had to settle for ill-fitting monocles that were less comfortable and less secure. In popular perception, a monocle could easily fall off with the wrongfacial expression. A once-standardcomedic device exploits this: an upper-class gentleman affects a shocked expression in response to some event, and his monocle falls into his drink or smashes to pieces on the floor.
Following the Prussian example monocles became fashionable among the officers of other peacetime European armies in the late 19th and early 20th centuries, especially in socially prestigious regiments such as those of the cavalry and guards. In an effort to curb what was seen as an unnecessary affectation, orders were sometimes issued limiting the wearing of monocles to individuals having a genuine optical need.
Monocles were most prevalent in the late 19th century, but are rarely worn today. This is due in large part to advances inoptometry which allow for better measurement ofrefractive error, so thatglasses andcontact lenses can be prescribed with differentstrengths in each eye.
TheNew Yorker mascotEustace Tilley, an early 19th-century dandy, is depicted using a monocle like a quizzing glass.
A monocle is also a distinctive part of the costume of at least threeGilbert & Sullivan characters:Major-General Stanley inThe Pirates of Penzance; Sir Joseph Porter inH.M.S. Pinafore; Reginald Bunthorne inPatience; Lord Tolloller inIolanthe; and Composer Sullivan. In some variant productions, numerous other characters wear the distinctive eyewear, and some noted performers of the "G&S" repertoire also have worn a monocle such asMartyn Green.
Captain Good, a character in the bookKing Solomon's Mines, wore a monocle. Remote natives thought it was part of his eye, giving credence to his claim that he was a god.
An unnamed antique bookstore proprietor played byPeter Cushing in the comedyTop Secret! wears a large monocle that seems to greatly magnify one eye, only to remove the monocle and reveal that his eye is actually ridiculously large as a visual gag