Correction of Refractive Errors Contact Lenses

A major use of contact lenses is to correct myopia, apha-kia, and astigmatism. It is critical to have a well-motivated patient who will wear contacts successfully. The many types of contact lenses mainly fall into four groups: (1) daily-wear hard lenses, (2) daily-wear soft lenses, (3) rigid, gas-permeable lenses, and (4) extended-wear soft lenses. Hard lenses have generally been constructed of polymethyl methacrylate. The material absorbs less fluid than soft contact lenses. Soft contacts may become 80% or more hydrated. New materials for hard and soft lenses continue to be developed. Complications of contact lenses, particularly extended-wear contacts, include infection, ocular allergies, follicular conjunctivitis, contact lens opacification, corneal edema, and corneal vas-cularization. Therefore, patients wearing contacts and complaining of red eyes require urgent evaluation.

Curing Eczema Naturally

Curing Eczema Naturally

Do You Suffer From the Itching, Redness and Scaling of Chronic Eczema? If so you are not ALONE! It strikes men and women young and old! It is not just

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