Eyeglasses

EyeglassesSixty percent of the 161 million Americans who wear prescription eyewear choose eyeglasses. Wearing eyeglasses is one of the simplest ways to correct vision problems.To see images clearly, light rays must focus directly on the retina, the light-sensitive nerve layer that lines the back of the eye.  There are different kinds of focusing problems, called refractive errors, which may require corrective lenses.In the case of myopia or nearsightedness, the eye is too long.  Light rays focus before reaching the retina and images appear blurry.  In hyperopia or farsightedness, the eye is too short, so light rays have not yet focused…

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