﻿Normal, nearsighted, and farsighted vision      Normal,
nearsighted, and farsighted vision      Normal, near, and
farsightedness      Normal vision occurs when light is focused
directly on the retina rather than in front or behind it. A
person with normal vision can see objects clearly both near and
faraway.      Nearsightedness results in blurred vision when the
visual image is focused in front of the retina, rather than
directly on it. It occurs when the physical length of the eye is
greater than the optical length. For this reason,
nearsightedness often develops in the rapidly growing school-
aged child or teenager, and progresses during the growth years,
requiring frequent changes in glasses or contact lenses. A
nearsighted person sees near objects clearly, while objects in
the distance are blurred.      Farsightedness is the result of
the visual image being focused behind the retina rather than
directly on it. It may be caused by the eyeball being too small
or the focusing power being too weak. Farsighte