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Zenni Optical (formerly 19dollareyeglasses.com) is an American online retailer of prescription glasses and sunglasses. Founded in 2003 by Tibor Laczay and Julia Zhen, it is based in Novato, California. The company sells more than 2,000 types of prescription glasses and sunglasses also contact lenses.
The most common type of corrective lens is "single vision", which has a uniform refractive index. For people with presbyopia and hyperopia, bifocal and trifocal glasses provide two or three different refractive indices, respectively, and progressive lenses have a continuous gradient.
Adjustable focus eyeglasses are eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users 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 eye position ...
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With prices starting at $60 per frame, prescription lenses included, Pair is already pretty affordable. However, for a limited time, Yahoo Life readers can save 15 percent on any Pair Eyewear ...
Other games. In addition to NVIDIA's official list of titles, there is an independently developed stereoscopic 3D games database that is put together by end users. Featuring a rules based certification grade and numeric Quality Assurance score, GameGrade3D (GG3D) details required game settings and expected visual anomalies (if any). See also
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