Near & Farsightedness, What are visual defects and how common are they?
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 tissue. Behind the sclera is a
watery fluid called the aqueous humor. This fluid fills a
cresent-shaped space which with the cornea helps bend
the light toward the center of the eye.
Under the aqueous humor is the iris which gives the
eye color. Th…
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