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SWAROVSKI OPTIK, headquartered in Absam, Tyrol, Austria is part of the Swarovski group of companies. Founded in 1949, the Austrian company specialises in the development and manufacturing of long-range optical instruments in the premium segment of the market, including binoculars, telescopes (spotting scopes), rifle scopes, range finders and night sight devices.
Two crescent or semi-circular shaped ring segments are inserted between the layers of the corneal stroma, one on each side of the pupil, [1] This is intended to flatten the cornea and change the refraction of light passing through the cornea on its way into the eye.
Torsional eye positions can also be measured using fundus cyclometry, which is based on infrared scanning laser ophthalmoscopy. [ 13 ] There have been contradictory statements on whether cyclovergence can be measured subjectively, that is, by an evaluation of the subjects' own statements on whether lines in a scene appear at an angle in the two ...
Binocular eyepieces usually consist of three or more lens elements in two or more groups. The lens furthest from the viewer's eye is called the field lens or objective lens and that closest to the eye the eye lens or ocular lens. The most common Kellner configuration is that invented in 1849 by Carl Kellner. In this arrangement, the eye lens is ...
The eye relief of an optical instrument (such as a telescope, a microscope, or binoculars) is the distance from the last surface of an eyepiece within which the user's eye can obtain the full viewing angle. If a viewer's eye is outside this distance, a reduced field of view will be obtained.
An ocular prosthesis, artificial eye or glass eye is a type of craniofacial prosthesis that replaces an absent natural eye following an enucleation, evisceration, or orbital exenteration. Someone with an ocular prosthesis is altogether blind on the affected side and has monocular (one sided) vision .