About 120 million people in the United States wear eyeglasses or contact lenses to correct nearsightedness, farsightedness, or astigmatism. These vision disorders–called refractive errors– affect the cornea and are the most common of all vision problems in this country. Refractive errors are usually corrected by eyeglasses or contact lenses. Although eyeglasses or contact lenses are safe and effective methods for treating refractive errors, refractive surgeries, such as LASIK, are becoming an increasingly popular option.
Other Cornea Conditions
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