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Bioptics, also known as a bioptic in the singular, and sometimes more formally termed a bioptic telescope, is a term for a pair of vision-enhancement lenses. They magnify between two and six times, and are used to improve distance vision for those with severely impaired eyesight, especially those with albinism .
The devices, called bioptic telescopic glasses, can help patients resume reading, recognizing faces across a room, watching TV, playing cards, in some cases even driving, Palmer said.
This word comes from French lorgnette, from lorgner (to take a sidelong look at), but it is a false friend: the equivalent French name for this (obsolete) optical instrument is face-à-main while lorgnette (or lunette d'approche, longue-vue) usually means a ship captain's (monocular) telescope.
A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. [1] It is equipped with some form of a referencing pattern – known as a reticle – mounted in a focally appropriate position in its optical system to provide an accurate point of aim.
On fixed power telescopic sights there is no significant difference, but on variable power telescopic sights the front plane reticle remains at a constant size compared to the target, while rear plane reticles remain a constant size to the user as the target image grows and shrinks.
Retina (the light-sensitive tissue lining the back of the eye) Macula (the part of the retina needed for central vision) Optic nerve (the nerve that connects the eye to the brain)
The Advanced Combat Optical Gunsight (ACOG) is a series of prismatic telescopic sights manufactured by Trijicon. The ACOG was originally designed to be used on the M16 rifle and M4 carbine, but Trijicon has also developed ACOG accessories for other firearms. Models provide fixed-power magnification levels from 1.25× to 6×. [1]
But the glasses themselves (which took around 10 days to arrive — your mileage may vary) are great; they're lightweight and comfortable, and Pair nailed my fairly complicated progressive-lens ...
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