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  2. Circle contact lens - Wikipedia

    en.wikipedia.org/wiki/Circle_contact_lens

    Circle contact lenses aim to create the illusion of stronger limbal rings (shown here are naturally prominent limbal rings without circle contact lenses). The diameter of regular contact lenses that are sold in the United States are on average 14–16 mm. Similar to the diameter of regular contact lenses, circle lenses have no more than 15 mm ...

  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." [ 36 ] 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. Otto Wichterle - Wikipedia

    en.wikipedia.org/wiki/Otto_Wichterle

    Wichterle's father Karel ,was co-owner of a successful farm-machine factory and small car plant but Otto chose science for his career. After finishing high school (today's Wolker Grammar School) in Prostějov, Wichterle began to study at the Chemical and Technological Faculty of the Czech Technical University (now the independent University of Chemistry and Technology, Prague) but he was also ...

  5. Corrective lens - Wikipedia

    en.wikipedia.org/wiki/Corrective_lens

    Multifocal contact lenses (e.g. bifocals or progressives) are comparable to spectacles with bifocals or progressive lenses because they have multiple focal points. Multifocal contact lenses are typically designed for constant viewing through the center of the lens, but some designs do incorporate a shift in lens position to view through the ...

  6. Zenni Optical - Wikipedia

    en.wikipedia.org/wiki/Zenni_Optical

    Zenni Optical mail order. Zenni Optical was founded in 2003 by Tibor Laczay and Julia Zhen. [1] [2] Before being renamed to Zenni Optical when it began offering $7 and $8 glasses, the company was named 19dollareyeglasses.com. [3] [4] [5] Around 2014, co-founder Zhen acquired the building occupied by the Marin Independent Journal to house Zenni. [6]

  7. List of soft contact lens materials - Wikipedia

    en.wikipedia.org/wiki/List_of_soft_contact_lens...

    In the US market, soft contact lenses are approved by the US Food and Drug Administration. [2] The American Optometric Association published a contact lens comparison chart called Advantages and Disadvantages of Various Types of Contact Lenses on the differences between them. [3] These include: soft contact lenses; rigid gas-permeable (RGP ...

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