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What Are Visual Defects And How Common Are They ?
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The human eye does alot more than allowing you to see. It is very
complex and has many parts and 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 tis ....
Middle of paper
....ight 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.
Bibliography
Coon, Dennis, Introduction to Psychology, St. Paul, Minnesota, West Publishing
Company, 1989, pp. 85-87.
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| Word count: 344 |
Page count: 2 |
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