Definition of Bifocals. Meaning of Bifocals. Synonyms of Bifocals

- Bifocals are eyegl****es with two distinct optical powers. Bifocals are commonly prescribed to people with presbyopia who also require a correction for...
- would be −2.5 diopters. Trifocal lenses are made in similar styles to bifocals, but with an additional segment for intermediate vision above the reading...
- rounded bifocals and D segment bifocals, that are selected for functional differences as well as the visual demands of the patient. Bifocals allow people...
- granted patents on two forms of bifocals which become commercially standardized as the "cemented" and "perfection" bifocals. Both had the serious faults...
- v t e Types of eyewear (Eye)gl****es / spectacles Belay Bifocals Browline Bug-eye Cat eye Chicken GI Groucho Horn-rimmed Lensless Lorgnette Opera Monocle...
- viewpoint of the heroine, and opens with a comment on Johnson Johnson's bifocals. Source: In this series, the date of publication is not the same as the...
- Ingenhousz 1781: William Herschel announces discovery of Ur**** 1784: Bifocals invented by Benjamin Franklin 1784: Argand lamp invented by Aimé Argand...
- to adjust them for desired distance or prescription, or both. Current bifocals and progressive lenses are static, in that the user has to change their...
- trifocal lenses Some people find them more cosmetically attractive. Because bifocals and related designs are ****ociated with old age, proponents have suggested...
- example, the numerical prefix bi- was raised in bicycle but not bi****ual or bifocals. Likewise, the vowel was consistently kept low when used in a prefix in...