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  2. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Some colored contact lenses completely cover the iris, thus dramatically changing eye color. Other colored contact lenses merely tint the iris, highlighting its natural color. A new trend in Japan, South Korea and China is the circle contact lens, which extend the appearance of the iris onto the sclera by having a dark tinted area all around ...

  3. 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. . Other structural changes may include the formation of epithelial vacuoles and microcysts (containing cellular debris), corneal neovascularization, as well as the emergence of polymegethism in the corneal endoth

  4. Color blind glasses - Wikipedia

    en.wikipedia.org/wiki/Color_blind_glasses

    While there is no lens that claims to grant achromats color vision, lenses are an important part of achromatopsia management. For example, another symptom of achromatopsia is photophobia, which makes it difficult to see in bright light. Strongly tinted sun glasses [24] or contact lenses [25] are often used to decrease luminosity. Red-tinted ...

  5. Optics and vision - Wikipedia

    en.wikipedia.org/wiki/Optics_and_vision

    Contact lenses usually serve the same corrective purpose as glasses, but are lightweight and virtually invisible—many commercial lenses are tinted a faint blue to make them more visible when immersed in cleaning and storage solutions. Some cosmetic lenses are deliberately colored to alter the appearance of the eye.

  6. 10 Things To Know Before Using Costco Optical - AOL

    www.aol.com/10-things-know-using-costco...

    VisionCenter.org puts the cost closer to $70 (and around $150 for a contact lens exam), which is also lower than the national average of $95. Call ahead to your local Costco optical department to ...

  7. Scleral lens - Wikipedia

    en.wikipedia.org/wiki/Scleral_lens

    Scleral lenses may be used to improve vision and reduce pain and light sensitivity for people with a growing number of disorders or injuries to the eye, such as severe dry eye syndrome, microphthalmia, keratoconus, [1] corneal ectasia, Stevens–Johnson syndrome, Sjögren's syndrome, [2] aniridia, neurotrophic keratitis (anesthetic corneas), complications post-LASIK, higher-order aberrations ...

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