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

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

    In patients who had worn contact lenses for approximately five years or more, a 30 to 50 μm reduction in central and peripheral corneal thickness has been recorded. Furthermore, the reduction was more pronounced in patients wearing hard contact lenses than in patients wearing soft contact lenses.

  4. Orthokeratology - Wikipedia

    en.wikipedia.org/wiki/Orthokeratology

    Orthokeratology lenses are made by a number of companies and all use special gas-permeable contact lenses to reshape the cornea. The lens material – and especially its oxygen permeability measured by its 'Dk' rating (the higher the value, the greater the degree of oxygen permeability) – is important for maintaining eye-health during the ...

  5. Canon AE-1 - Wikipedia

    en.wikipedia.org/wiki/Canon_AE-1

    Dimensions. 87 × 141 × 47.5 mm. Weight. 590 g. Made in. Japan. The Canon AE-1 is a 35 mm single-lens reflex (SLR) film camera for use with interchangeable lenses. It was manufactured by Canon Camera K. K. (today Canon Incorporated) in Japan from April 1976 to 1984.

  6. Progressive lens - Wikipedia

    en.wikipedia.org/wiki/Progressive_lens

    In normal use, a much smaller section of the lens is used, so that the distortion is much smaller. Progressive lenses are corrective lenses used in eyeglasses to correct presbyopia and other disorders of accommodation. They are characterised by a gradient of increasing lens power, added to the wearer's correction for the other refractive errors.

  7. Who Is Actually Behind Costco's Kirkland Signature Products - AOL

    www.aol.com/actually-behind-costcos-kirkland...

    Contact Lenses: CooperVision Out there in the real world, you won’t be able to get your hands on a box of CooperVision lenses for less than $80. But at Costco (not the real world)?