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  2. Telecentric lens - Wikipedia

    en.wikipedia.org/wiki/Telecentric_lens

    A telecentric lens is a special optical lens (often an objective lens or a camera lens) that has its entrance or exit pupil, or both, at infinity. The size of images produced by a telecentric lens is insensitive to either the distance between an object being imaged and the lens, or the distance between the image plane and the lens, or both, and ...

  3. Luxottica - Wikipedia

    en.wikipedia.org/wiki/Luxottica

    The new entity will be worth around $50bn (£37bn), sell close to a billion pairs of lenses and frames every year, and have a workforce of more than 140,000 people." [ 34 ] On 1 October 2018 the new holding company EssilorLuxottica was founded, resulting in combined market capitalization of approximately €46.3 billion as of the date of the ...

  4. Clear lens extraction - Wikipedia

    en.wikipedia.org/wiki/Clear_lens_extraction

    Clear lens extraction, also known as refractive lensectomy, custom lens replacement or refractive lens exchange is a surgical procedure in which clear lens of the human eye is removed. Unlike cataract surgery , where the cloudy lens is removed to treat a cataract , clear lens extraction is done to surgically correct refractive errors such as ...

  5. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    A Fresnel lens (/ ˈ f r eɪ n ɛ l,-n əl / FRAY-nel, -⁠nəl; / ˈ f r ɛ n ɛ l,-əl / FREN-el, -⁠əl; or / f r eɪ ˈ n ɛ l / fray-NEL [1]) is a type of composite compact lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections.

  6. Intraocular lens - Wikipedia

    en.wikipedia.org/wiki/Intraocular_lens

    During CLEAR, the crystalline lens is extracted and an IOL replaces it in a process that is very similar to cataract surgery: both involve lens replacement, local anesthesia, last approximately 30 minutes, and require making a small incision in the eye for lens insertion. People recover from CLEAR surgery 1–7 days after the operation.

  7. Mystery swirls around Indiana boy who vanished 5 years ago ...

    www.aol.com/news/mystery-swirls-around-indiana...

    Authorities are investigating the mysterious disappearance of a 9-year-old Indiana boy who has been missing for more than five years without his family realizing.

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