The cornea is a part of the eye that helps focus light
to create an image on the retina, just as the lens of
a camera focuses light to create an image on film. The
bending and focusing of light is also known as refraction.
The shape of the cornea and the eye are not perfect
and the image on the retina is prone to refractive errors,
out-of-focus or distorted.
There are three primary types of refractive errors:
- Myopia - nearsightedness, more difficulty seeing
distant objects as clearly as near objects
- Hyperopia - farsightedness, more difficulty seeing
near objects as clearly as distant objects.
- Astigmatism - a distortion of the image on the retina
caused by irregularities in the cornea or lens of
Combinations of myopia and astigmatism or hyperopia
and astigmatism are common. Glasses or contact lenses
are designed to compensate for the eye's imperfections.
A number of conditions impact the eye and surrounding
areas. Some of these are not
necessarily age related, whlist others are common
to all over the age of 50.
The main eye diseases
affecting sight are:
For Further Information on Impact
of Aging on Eyesight
Treatments For Eyes
Vision Impairment Simulator
Simulator is designed to help you better understand
the possible progression of some of the more common
eye diseases and conditions. It approximates what sufferers
of various eye conditions might see at the different
stages of each condition.
For the latest
updates on eye disease and supporting treatments
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