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.
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
causing double vision or distorted vision.
At tri County
Eye Clinic we have a Nidek OPD Scanner, representing the latest
technology to map the cornea of each eye of each patient.
this new wave front technology is in the process of being coordinated
so that surgical procedures such as LASIK can be performed
to a greater degree of accuracy.
Corneal topography is painless and non-invasive. The test is also
used when attempting to fit difficult contact lenses.