Corneal Topography
The
cornea is the clear tissue that is continuous with the sclera
(white portion of the eye) and lies in front of the iris (the
colored tissue) and the pupil (black hole in the middle of
the iris) and is moistened by the tears and cleaned by the blinking
of the eye lids.
Light shines
through the cornea, through the pupil and the lens, and an image
is delivered to the back of
the eye. The topography
is a mapping of the surface of the cornea. Everyone's cornea
has a unique shape. Some have hills, and odd shapes that refract
light
causing double vision or distorted vision.
