Definition of Trifocals. Meaning of Trifocals. Synonyms of Trifocals

- length), and near vision. John Isaac Hawkins developed the trifocal lens in 1827. Trifocals are mostly used by people with advanced presbyopia who have...
- derived from the geometry of the back surface of the lens. Bifocals and trifocals result in a more complex lens profile, compounding multiple surfaces....
- prescribed to correct presbyopia may be simple reading gl****es, bifocals, trifocals, or progressive lenses. People over 40 are at risk for developing presbyopia...
- In computer vision, the trifocal tensor (also tritensor) is a 3×3×3 array of numbers (i.e., a tensor) that incorporates all projective geometric relationships...
- as a generalized ellipse. Generalized conics with three foci are called trifocal ellipses. This can be further generalized to curves which are obtained...
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- aviators. Adjustable-focus eyegl****es might be used to replace bifocals or trifocals, or might be used to produce cheaper single-vision gl****es (since they...
- November 1951). "Experiment in Which Fifty Presbyopes Were Provided with Trifocal Gl****es". Archives of Ophthalmology. 46 (5): 542–548. doi:10.1001/archopht...
- that provide limited visual accommodation. Multifocal IOLs can also be trifocal IOLs or extended depth of focus (EDOF) lenses. As of 2021, nearly 28 million...
- Lorgnette Opera Monocle Pince-nez Pinhole Rimless Scissors Shooting Smart Trifocals Windsor X-ray Sungl****es Aviator Mirrored Solar viewer Shutter Wayfarer...