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2. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.

3. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   The prism value is measured in prism diopters, and Base refers to the direction of displacement. PL is an abbreviation for plano or plain, meaning no prescription PD or IPD Pupillary Distance or Interpupillary Distance, respectively.

4. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Prism correction. Prism lenses (here unusually thick) are used for pre-operative prism adaptation. Eye care professionals use prism correction as a component of some eyeglass prescriptions. A lens which includes some amount of prism correction will displace the viewed image horizontally, vertically, or a combination of both directions.

5. The 7 best websites to buy prescription eyeglasses online - AOL

   www.aol.com/finance/7-best-websites-buy...

   For premium support please call: 800-290-4726 more ways to reach us

6. Best Websites to Buy Prescription Glasses - AOL

   www.aol.com/news/2011-01-07-best-websites-to-buy...

   In this video I highlight the best places to buy your next pair of glasses online.

7. Prism (optics) - Wikipedia

   en.wikipedia.org/wiki/Prism_(optics)

   Not all optical prisms are geometric prisms, and not all geometric prisms would count as an optical prism. Prisms can be made from any material that is transparent to the wavelengths for which they are designed. Typical materials include glass, acrylic and fluorite .

8. Adjustable-focus eyeglasses - Wikipedia

   en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

   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.

9. Got prescription glasses? Here's how you should wear solar ...

   www.aol.com/got-prescription-glasses-heres-wear...

   Doctor advises those with prescription glasses to put the solar eclipse viewers on top.

10. Zenni Optical - Wikipedia

    en.wikipedia.org/wiki/Zenni_Optical

    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 .

11. Progressive lens - Wikipedia

    en.wikipedia.org/wiki/Progressive_lens

    Progressive lenses are corrective lenses used in eyeglasses to correct presbyopia and other disorders of accommodation. They are characterised by a gradient of increasing lens power, added to the wearer's correction for the other refractive errors. The gradient starts at the wearer's distance prescription at the top of the lens and reaches a ...