About contact lens Contact lenses are vision correction devices worn directly on the cornea to rectify conditions such as myopia (nearsightedness), hyperopia (farsightedness), astigmatism (blurred vision because of the shape of the cornea), and presbyopia (inability to see things that are near). Contact lenses are used for corrective purposes, therapeutic purposes, and cosmetic purposes. Depending on the material used and the design, they can be categorized into spherical contact lenses, multifocal contact lenses, toric contact lenses, and other contact lenses. The global contact...more >>
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