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2. Optics and vision - Wikipedia

   en.wikipedia.org/wiki/Optics_and_vision

   A computer system tracks the patient's eye position 60 to 4,000 times per second, depending on the brand of laser used, redirecting laser pulses for precise placement. Most modern lasers will automatically center on the patient's visual axis and will pause if the eye moves out of range and then resume ablating at that point after the patient's ...

3. Serengeti Eyewear - Wikipedia

   en.wikipedia.org/wiki/Serengeti_Eyewear

   Serengeti Eyewear is a sunglasses line owned by Bollé Brands. Their main focus is eye protection; the company researches and develops technology such as photochromic lenses, polarized lenses, spectral control, among others.

4. Global access to cataract surgery - Wikipedia

   en.wikipedia.org/wiki/Global_access_to_cataract...

   A 2009 study showed that the prevalence of cataract blindness in people 50 years and older ranged from 0.5% in Buenos Aires, to 2.3% in parts of Guatemala. Poor vision due to cataracts ranged from 0.9% in Buenos Aires, to 10.7% in parts of Peru. Cataract-surgical coverage ranged from good in parts of Brazil to poor in Paraguay, Peru, and ...

5. The Best Sunglasses for Your Face Shape, According to Our ...

   www.aol.com/lifestyle/best-sunglasses-face-shape...

   Summer is here and it's finally time to update your sunglasses collection. If you want to pick up a new pair (or two) but don’t know where to start, check out our guide to which sunnies look the ...

6. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Spectacles are made of only one ophthalmic lens, and the best-form spheric lens has been shown to give the best vision. [citation needed] In cases where best-form is not used, such as cosmetic flattening, thinning or wrap-around sunglasses, an aspheric design can reduce the amount of induced optical distortions. [citation needed]

7. Cataract surgery - Wikipedia

   en.wikipedia.org/wiki/Cataract_surgery

   Cataract surgery, also called lens replacement surgery, is the removal of the natural lens of the eye that has developed a cataract, an opaque or cloudy area. [1] The eye's natural lens is usually replaced with an artificial intraocular lens (IOL) implant.