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  2. Where to find prescription and blue light glasses on sale for ...

    www.aol.com/where-prescription-blue-light...

    TL;DR: A few of the best places to order glasses online are having big Labor Day sales: Save up to 60% on GlassesUSA, EyeBuyDirect, Ray-Ban, and Quay Australia through Sept. 7. Blue light lenses ...

  3. Monocle - Wikipedia

    en.wikipedia.org/wiki/Monocle

    A monocle is a type of corrective lens used to correct or enhance the visual perception in only one eye. It consists of a circular lens placed in front of the eye and held in place by the eye socket itself. Often, to avoid losing the monocle, a string or wire is connected to the wearer's clothing at one end and, at the other end, to either a ...

  4. New Eyes for the Needy - Wikipedia

    en.wikipedia.org/wiki/New_eyes_for_the_needy

    New Eyes official website logo. New Eyes for the Needy is a non-profit organization started in 1932 as New Eyes (incorporated 1948 [1]) and based in Short Hills, New Jersey, which provides people in the United States with eyeglasses and sends recycled eyeglasses to needy people overseas. [2] [3] [4]

  5. Essilor - Wikipedia

    en.wikipedia.org/wiki/Essilor

    Essilor International is an international ophthalmic optics company that designs, manufactures and markets lenses to correct or protect eyesight. [1] Its headquarters is in Charenton-le-Pont (near Paris), France . It is the world's largest manufacturer of ophthalmic lenses. [2]

  6. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

  7. Adjustable-focus eyeglasses - Wikipedia

    en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

    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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