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  2. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Contact lenses are thin lenses placed directly on the surface of the eyes for vision correction or cosmetic reasons. Learn about the origins, development and classification of contact lenses from this comprehensive Wikipedia article.

  3. List of soft contact lens materials - Wikipedia

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

    Etafilcon A is a type of soft contact lens material that belongs to the FDA group IV, which has high water content and ionic properties. It is used in some brands of lenses, such as Cooper Clear, Cooper Toric, and Vantage.

  4. America's Best Contacts & Eyeglasses - Wikipedia

    en.wikipedia.org/wiki/America's_Best_Contacts...

    Learn about the history, ownership and services of America's Best Contacts & Eyeglasses, a discount provider of eye exams, eyeglasses and contact lenses in the US. Find out how it became the largest buyer of designer overstock eyeglass frames and a division of KKR.

  5. 1-800 Contacts - Wikipedia

    en.wikipedia.org/wiki/1-800_Contacts

    1-800 Contacts is a private company that sells contact lenses and glasses online and through partnerships with Walmart and other brands. It was founded in 1995 and has been acquired by several investors, including KKR in 2020.

  6. Effects of long-term contact lens wear on the cornea - Wikipedia

    en.wikipedia.org/wiki/Effects_of_long-term...

    The effects of extended contact lens wear on the cornea have been studied extensively and are well-documented. When determining the effects of long-term contact lens use on the cornea, many studies do not differentiate between users of hard and soft contact lenses, while studies that have made this differentiation have found similar results.

  7. Point of total assumption - Wikipedia

    en.wikipedia.org/wiki/Point_of_total_assumption

    Learn the definition, calculation and history of point of total assumption (PTA), a concept in project management and contracting. PTA is the point where the seller bears all the costs of a cost overrun and the buyer pays the ceiling price.

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