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  2. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    A pair of contact lenses, positioned with the concave side facing upward. Putting contacts in and taking them out. One-day disposable contact lenses with blue handling tint in blister-pack packaging. Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic devices used ...

  3. 77 best discounts for ages 50+: Where to save money for ...

    www.aol.com/finance/best-senior-discounts...

    Target — $10 off eyewear and contact lenses and 50% off prescription eyewear for AARP members Ages 60 and older Kohl's — 15% discount every Wednesday on select brands

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

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

    Long-term contact lens use can lead to alterations in corneal thickness, stromal thickness, curvature, corneal sensitivity, cell density, and epithelial oxygen uptake, etc. Other changes may include the formation of epithelial vacuoles and microcysts (containing cellular debris) as well as the emergence of polymegethism in the corneal endothelium.

  5. List of soft contact lens materials - Wikipedia

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

    Lenses made of PMMA are called hard lenses. [5] Soft contact lenses were first produced in 1961 by Czech chemical engineer Otto Wichterle using polyhydroxyethylmethacrylate (pHEMA), a material that achieved long-term commercial application. Lenses made of polyacrylamide were introduced in 1971. [5]

  6. What to know about a Costco membership - AOL

    www.aol.com/news/know-costco-membership...

    The annual membership fee is $60, and a total of two people over the age of 18 living at the same address can use the membership. The Business Membership also costs $60 a year, but is exclusively ...

  7. History of photographic lens design - Wikipedia

    en.wikipedia.org/wiki/History_of_photographic...

    The fourteen element/eleven group Kiron was first 35mm SLR zoom lens to extend from standard wide angle to long telephoto (sometimes referred to as "superzoom"), able to replace 28, 35, 50, 85, 105, 135 and 200mm prime lenses, albeit restricted to a small variable maximum aperture to keep size, weight and cost within reason (129×75 mm, 840 g ...

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