 You
eye works much like a camera. Light rays from
something you are looking at enter the eye and
pass through a focusing mechanism. The focusing
mechanism mostly consists of 2 parts. The first
is a "fixed focus" cornea. The second is an "automatic
focus" lens. These structures allow for light
to be properly focused on the retina, the "film"
of the eye. The retina transmits the images formed
upon it to the brain so that you are aware of
what you are seeing.
Those needing laser vision correction have a cornea
which does not have the correct "fixed focus"
for proper focusing of incoming light rays onto
the retina. In laser vision correction, the shape
of the cornea is adjusted so that light is properly
focused on the retina resulting in clear images
being sent to the brain. |
