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Types. The FDA classifies soft contact lenses into four groups for the US market. They are also subcategorized into 1st generation, 2nd generation, and 3rd generation lens materials. [6] These 'water-loving' soft contact lens materials are categorized as "Conventional Hydrophilic Material Groups ("-filcon"): Group. Water Content.
Although many brands of contact lenses are lightly tinted to make them easier to handle, cosmetic lenses worn to change eye color are far less common, accounting for only 3% of contact lens fits in 2004. In the United States, the FDA labels non-corrective cosmetic contact lenses as decorative contact lenses. Like any contact lens, cosmetic ...
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.
1-800 Contacts Inc. is an American contact lens retailer based in Draper, Utah. The brands that 1-800 Contacts use includes Johnson & Johnson Vision Care, Alcon, Bausch & Lomb and CooperVision. The company was founded as the industry's first way to buy contacts online and has since expanded to provide online prescription renewals, glasses, lens ...
Orthokeratology, also referred to as Night lenses, Ortho-K, OK, Overnight Vision Correction, Corneal Refractive Therapy (CRT), Accelerated Orthokeretology, Cornea Corrective Contacts, Eccentricity Zero Molding, and Gentle Vision Shaping System (GVSS), is the use of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia, hyperopia, and ...
AC Lens is a privately held company based in Columbus, Ohio that sells contact lenses, eyeglasses and vision care products online. Origin [ edit ] Arlington Contact Lens Service, Inc (AC Lens) was formed in 1995 and launched in 1996 by Dr. Peter Clarkson in the back of an optometrist's office on the campus of Ohio State University in Columbus ...
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