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  2. Progressive lens - Wikipedia

    en.wikipedia.org/wiki/Progressive_lens

    The gradient starts at the wearer's distance prescription at the top of the lens and reaches a maximum addition power, or the full reading addition, at the bottom of the lens. The length of the progressive power gradient on the lens surface depends on the design of the lens, with a final addition power between 0.75 and 3.50 dioptres .

  3. Optics and vision - Wikipedia

    en.wikipedia.org/wiki/Optics_and_vision

    Glasses (also called eyeglasses or spectacles) are frames bearing lenses worn in front of the eyes, normally for vision correction, eye protection, or for protection from UV rays. Modern glasses are typically supported by pads on the bridge of the nose and by temple arms placed over the ears .

  4. Eye examination - Wikipedia

    en.wikipedia.org/wiki/Eye_examination

    An eye examination, commonly known as an eye test, [1] is a series of tests performed to assess vision and ability to focus on and discern objects. It also includes other tests and examinations pertaining to the eyes. Eye examinations are primarily performed by an optometrist, ophthalmologist, or an orthoptist.

  5. Category:Optometry - Wikipedia

    en.wikipedia.org/wiki/Category:Optometry

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate; Pages for logged out editors learn more

  6. Category:Corrective lenses - Wikipedia

    en.wikipedia.org/wiki/Category:Corrective_lenses

    A corrective lens is a lens worn on or before the eye. They are used to treat myopia , hypermetropia , astigmatism , and presbyopia . The main article for this category is Corrective lens .

  7. Bifocals - Wikipedia

    en.wikipedia.org/wiki/Bifocals

    Bifocals are eyeglasses with two distinct optical powers. ... [12] in 1936, a method of grinding two prescriptions simultaneously on that Tilted Bifocal Lens, [13] ...

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