બાયફોકલ,

bifocals's Usage Examples:

Adjustable-focus eyeglasses might be used to replace bifocals or trifocals, or might be used to produce cheaper single-vision glasses.

via microscopes, telescopes, bifocals etc.

" He looks askance at you over his wire-rimmed bifocals.

Current bifocals and progressive lenses are static, in that the user has to change their.

viewpoint of the heroine, and opens with a comment on Johnson Johnson"s bifocals.

Trifocal lenses are made in similar styles to bifocals, but with an additional segment for intermediate vision above the reading.

A halo of white hair and tinted bifocals frame a round face and otherwise shiny pate.

bifocals or progressives) are comparable to spectacles with bifocals or progressive lenses because they have multiple.

John Isaac Hawkins, the inventor of trifocal lenses, coined the term bifocals in 1824 and credited Benjamin Franklin.

granted patents on two forms of bifocals which become commercially standardized as the "cemented" and "perfection" bifocals.

distinct focal planes that are substantially separated, in the manner of bifocals to switch their vision from up-close to distance, for easy and efficient.

Glasses used to correct presbyopia may be simple reading glasses, bifocals, trifocals, or progressive lens.

Synonyms:

specs, glasses, eyeglasses, spectacles,