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2. Intraocular lens - Wikipedia

   en.wikipedia.org/wiki/Intraocular_lens

   Intraocular lens. An Intraocular lens ( IOL) is a lens implanted in the eye usually as part of a treatment for cataracts or for correcting other vision problems such as short sightedness and long sightedness; a form of refractive surgery. If the natural lens is left in the eye, the IOL is known as phakic, otherwise it is a pseudophakic lens (or ...

3. Fungal contamination of contact lenses - Wikipedia

   en.wikipedia.org/wiki/Fungal_contamination_of...

   Possible fungal contaminated lens. Microbial corneal infection is the most serious and "most common vision threatening" [1] [2] complication of contact lens wear, [1] which is believed to be strongly associated with contact lens cases. [1] Such infections "are being increasingly recognized as an important cause of morbidity and blindness" [2 ...

4. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Corrective lens. A pair of contact lenses, positioned with the concave side facing upward. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia.

5. Progressive lens - Wikipedia

   en.wikipedia.org/wiki/Progressive_lens

   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. The gradient starts at the wearer's distance prescription at the top of the lens and reaches a ...

6. Toric lens - Wikipedia

   en.wikipedia.org/wiki/Toric_lens

   Toric lens surface as "cap" (top-right) from a torus (here with R = 1.2 r ). A toric lens is a lens with different optical power and focal length in two orientations perpendicular to each other. One of the lens surfaces is shaped like a "cap" from a torus (see figure at right), and the other one is usually spherical.

7. Kiron Lenses - Wikipedia

   en.wikipedia.org/wiki/Kiron_Lenses

   The company was set up as a U.S. subsidiary of Kino Precision Industries Limited, Tokyo, Japan and registered as a trademark on Jan 25 1980, [1] in order to market manually focused film camera optical lenses to the United States. Kino Precision was founded in 1959 by Tatsuo Kataoka to manufacture lenses for 8mm movie cameras. Originally, Kino ...