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Etafilcon A is a type of soft contact lens material that belongs to the FDA group IV, which has high water content and ionic properties. It is used in some brands of lenses, such as Cooper Clear, Cooper Toric, and Vantage.
Contact lenses are thin lenses placed directly on the surface of the eyes for vision correction or cosmetic reasons. Learn about the origins, development and classification of contact lenses from this comprehensive Wikipedia article.
Astigmatism is an optical aberration where rays from different planes have different foci. Learn about the forms, causes, and corrections of astigmatism in optical systems and vision science.
Bausch & Lomb is an American-Canadian company that produces contact lenses, lens care products, pharmaceuticals, and other eye surgery products. It was founded in 1853 in Rochester, New York, and has a history of innovation and collaboration with Zeiss and Saegmuller.
Acuvue is a product line of Vistakon, a subsidiary of Johnson & Johnson, that offers different types of contact lenses for various needs and preferences. Learn about the history, profile, and brands of Acuvue, as well as some discontinued products and external links.
The effects of extended contact lens wear on the cornea have been studied extensively and are well-documented. When determining the effects of long-term contact lens use on the cornea, many studies do not differentiate between users of hard and soft contact lenses, while studies that have made this differentiation have found similar results.
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