Normally, light is focused by the cornea and lens
to form a sharp image on the retina. Long-
sightedness occurs when the eyeball is slightly
too short, so that objects are in focus behind the
retina at the back of the eye. This may result in blurred vision when looking in
the distance and particularly when looking at near
objects and reading. When we are young, we
overcome long-sightedness by bulging out the lens
in the eye. However, as we get older, the lens
gets harder and can no longer bulge out enough. Long-sightedness can be corrected by spectacles or
contact lenses. |
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