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2. 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. Current bifocals and progressive lenses are static, in that the user has ...

3. 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]

4. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   Eyeglass prescription. Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.

5. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Corrective lens. A pair of contact lenses, positioned with the concave side facing upward. 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.

6. Warby Parker - Wikipedia

   en.wikipedia.org/wiki/Warby_Parker

   3,491 (2023) Website. warbyparker.com. Footnotes / references. [1] Warby Parker Inc. is an American manufacturer and retailer of prescription glasses, contact lenses, and sunglasses, based in New York City. Founded in 2010, it was initially an online-only retailer. It now sells primarily (about 90%) through more than 200 physical retail stores ...

7. Do it safely: Free glasses up until eclipse Monday afternoon ...

   www.aol.com/safely-free-glasses-until-eclipse...

   Anyone will be able to pick up free glasses Monday morning up until the eclipse at the School of Optometry and the Eye and Vision Center at the Massachusetts College of Pharmacy and Health ...