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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.
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 astronomer draws a globe on a blackboard. The globe develops a sun-like head and limbs and starts to move on the blackboard. Objects the astronomer attempts to interact with transform or move away from him. The Moon suddenly appears in the building as a large face, eating the astronomer's telescope.
Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal-mounted military ...
Bifocals are eyeglasses with two distinct optical powers correcting vision at both long and short distances. Bifocals are commonly prescribed to people with presbyopia who also require a correction for myopia , hyperopia , and/or astigmatism .
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.
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