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What Are Visual Defects And How Common Are They ?
Part 1 of Paper
.... features which can have defects. However, to
understand defects you must first know how the eye works.
First light passes through the cornea, which is the transparent part of
the sclera, or white of the eye, which is composed of tough fiberous tissue.
Behind the sclera is a watery fluid called the aqueous humor. Th....
Part 2 of Paper
....he most common visual defects are nearsightedness and farsightedness.
In nearsightedness, also known as myopia, the eye is longer than usual. This is
corrected by using a concave lens to spread the light rays just enough to
increase the eye's focal length. Hyperopia, also known as farsightedness, is
caused by a shorter than usual eye. A convex lens increases light bending and
returns the point of focus to the retina.
Coon, Dennis, Introduction to Psychology, St. Paul, Minneso....
|Number of words: 344 - Approximate pages: 2
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