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Joseph Chamberlain wearing a monocle. A monocle is a type of corrective lens used to correct or enhance the visual perception in only one eye. It consists of a circular lens placed in front of the eye and held in place by the eye socket itself. Often, to avoid losing the monocle, a string or wire is connected to the wearer's clothing at one end ...
Monocular vision is known as seeing and using only one eye in the human species. Depth perception in monocular vision is reduced compared to binocular vision, but still is active primarily due to accommodation of the eye and motion parallax. The word monocular comes from the Greek root, mono for single, and the Latin root, oculus for eye.
Galilean type Soviet-made miniature 2.5 × 17.5 monocular Diagram of a monocular using a Schmidt-Pechan prism: 1 – Objective lens 2 – Schmidt-Pechan prism 3 – Eyepiece. A monocular is a compact refracting telescope used to magnify images of distant objects, typically using an optical prism to ensure an erect image, instead of using relay lenses like most telescopic sights.
This federal law requires that optical care providers release their patients' prescriptions to them. AC Lens was provided the opportunity to comment and suggest changes to the FTC on March 31, 2004. [3] The final ruling on the law was released by the FTC in July 2004. [4] In October 2004, the FTC released a A Guide for Prescribes and Sellers.
Scissors-glasses (or binocles-ciseaux) are eyeglasses, normally used to correct distance vision, mounted on scissoring stems rather than on temple stems as modern eyeglasses are. The invention of scissors-glasses solved the problem of the single-lensed monocle or "quizzing glass", thought to be tiresome to the eye, by providing two lenses on a ...
Research continues in an attempt to eliminate the limited field of vision in current bifocals. New materials and technologies may provide a method which can selectively adjust the optical power of a lens. Researchers have constructed such a lens using a liquid crystal layer applied between two glass substrates. [citation needed]