Category:Bifocals

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bifocal lens

Бифокальные очки доктора Василия Веселаго (2).jpg

Bifocals are eyeglasses with two distinct optical powers. Bifocals are commonly prescribed to people with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism.

Subclass of

Discoverer or inventor

Benjamin Franklin

Authority control

Media in category "Bifocals"

The following 14 files are in this category, out of 14 total.

BenjaminFranklinbyGeorgeSStuart.jpg 333 × 500; 37 KB
Bifocals by Benjamin Franklin - Franklin Institue - DSC06605.JPG 4,320 × 3,240; 4.8 MB
Bifocals Commemorative Medallion, Sesquicentennial, Felix Weil, c. 1934 - Franklin Institute - DSC06604.JPG 4,320 × 3,240; 4.77 MB
Bifoklabrille fcm.jpg 2,096 × 1,920; 1.08 MB
Four Nines Optical frame-02.jpg 2,956 × 2,422; 1.76 MB
Hugh Lancelot Beales, c1980s (5354510850).jpg 600 × 887; 97 KB
Jan-Öjvind Swahn vid doktorspromovering 2006-06-02.jpg 848 × 1,272; 434 KB
Martin Scorsese by David Shankbone.jpg 1,081 × 1,471; 567 KB
PBS bifocal mask P9251477.JPG 3,648 × 2,736; 2.06 MB
Schubert's Brille.jpg 1,001 × 667; 724 KB
TwoRoundGlassesBifocals.jpg 1,233 × 1,659; 1.13 MB
US Navy 090617-N-1783P-009 Bob Gore uses bifocals that provide a magnification factor of 10x to read text.jpg 3,330 × 2,220; 1.3 MB
Бифокальные очки доктора Василия Веселаго (1).jpg 6,471 × 4,960; 15.35 MB
Бифокальные очки доктора Василия Веселаго (2).jpg 3,234 × 5,104; 9.41 MB

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