Also known as photokeratoscopy or videokeratography, corneal topography is a non-invasive means of mapping the curve of the cornea’s surface. Evaluating the surface curvature of the cornea is critical in determining your quality of vision because the cornea is responsible for approximately 70% of the eye’s refractive activities. Corneal topography provides an eye doctor a three-dimensional map of the cornea, which can assist in:
If you must have this procedure performed, you will be seated facing a bowl with an illuminated pattern—typically a pattern of concentric circles. The pattern of circles is focused on your cornea and reflected back to a digital camera at the center of the bowl. The camera is actually referred to as a “charge-coupled device camera” (CDC). The curvature of your cornea is revealed by the shape taken by the reflected pattern. Your eye doctor will then have a computer analysis of the topography of your cornea.
Interpretation of corneal topography results is very complicated and difficult to explain to the lay person on a web page. Your eye doctor will certainly explain your test results at the time of your visit and answer all of your questions.
While corneal topography can assist in screening for keratoconus, it is not sufficient for a definitive diagnosis of this condition because there are other disorders that can simulate keratoconus.
To learn more about corneal topography, keratoconus and why this procedure may be indicated for you, please contact an experienced eye doctor in your area today to get your questions answered and your fears about corneal problems allayed.