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  2. 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.

  3. Belle Vernon, Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/Belle_Vernon,_Pennsylvania

    15012 [3] Area code. 724. FIPS code. 42-05288. Belle Vernon is a borough in Fayette County, Pennsylvania, United States. It is situated along the Monongahela River, abutting two other counties, Westmoreland to the north and Washington across the river. As of the 2020 census, Belle Vernon had a population of 1,025.

  4. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [6] The terms low vision and blindness ...

  5. Meta unveils AR glasses prototype, Zuckerberg's 'time ... - AOL

    www.aol.com/news/meta-readies-ar-glasses-reveal...

    The Orion glasses are made of magnesium alloy and powered by custom silicon designed by Meta. Users will be able to interact with the glasses through hand-tracking, voice and wrist-based neural ...

  6. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    Eye examination for visual acuity. Visual acuity is a measure of the spatial resolution of the visual processing system. VA, as it is sometimes referred to by optical professionals, is tested by requiring the person whose vision is being tested to identify so-called optotypes – stylized letters, Landolt rings, pediatric symbols, symbols for the illiterate, standardized Cyrillic letters in ...

  7. Color blind glasses - Wikipedia

    en.wikipedia.org/wiki/Color_blind_glasses

    Color blindness (color vision deficiency) is the decreased ability to see color or differences in color. It can impair daily color tasks such as selecting ripe fruit or choosing clothing, as well as safety-related tasks such as interpreting traffic lights. While the disability of color blindness is considered minor, the use of color in safety ...

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