Definition of Bifocals. Meaning of Bifocals. Synonyms of Bifocals

Here you will find one or more explanations in English for the word Bifocals. Also in the bottom left of the page several parts of wikipedia pages related to the word Bifocals and, of course, Bifocals synonyms and on the right images related to the word Bifocals.

Definition of Bifocals

Bifocal
Bifocal Bi*fo"cal, a. [Pref. bi-+ focal.] Having two foci, as some spectacle lenses.

Meaning of Bifocals from wikipedia

- Bifocals are eyegl****es with two distinct optical powers correcting vision at both long and short distances. Bifocals are commonly prescribed to people...
- rounded bifocals and D segment bifocals, that are selected for functional differences as well as the visual demands of the patient. Bifocals allow people...
- plastic aviators. Adjustable-focus eyegl****es might be used to replace bifocals or trifocals, or might be used to produce cheaper single-vision gl****es...
- 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...
- granted patents on two forms of bifocals which become commercially standardized as the "cemented" and "perfection" bifocals. Both had the serious faults...
- 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...
- Live!, Carey revealed that when he turned 40, he developed a need for bifocals. Carey proposed to Nicole Jaracz in 2007. The couple did not wed and called...
- current. His numerous important inventions include the lightning rod, bifocals, gl**** harmonica and the Franklin stove. He founded many civic organizations...
- focus on close objects) is ****ociated with Down syndrome, which may mean bifocals are indicated. In keratoconus, the cornea progressively thins and bulges...
- Gl****es prescribed to correct presbyopia may be simple reading gl****es, bifocals, trifocals, or progressive lenses. People over 40 are at risk for developing...