Fitting Keratoconic Patients With Rigid Gas Permeable Contact Lenses Using Topography.

PURPOSE: This study measures the accuracy fitting keratoconic patients with rigid gas permeable (RGP) contact lenses using topography. METHODS: The desired end point for fitting these lenses is a three-point-touch pattern. The values from topography were taken from the yellow values and compared to the base curve of the lenses determined by fitting with a trial lens set. RESULTS: When compared to the base curves of RGP lenses fit by trial, the lenses fit with topography showed no significant statistical difference. CONCLUSION: Topography is a useful tool helping with the initial base curve selection when fitting keratoconic patients with contact lenses, although the lenses must be fit and evaluated on an individual bases.