A European fitting philosophy for aspheric, high-Dk RGP contact lenses

Microbial keratitis, the most serious complication of contact lens wear, is most frequently associated with soft contact lenses. Rigid gas permeable (RGP) lens wearers are less often affected. Increased use of high-Dk RGP lenses could reduce the number of cases of microbial keratitis. In Europe, aspheric high-Dk RGP lenses are very popular. This article presents practical guidelines for computer-aided fitting of aspheric RGP lenses. Base curve selection using the keratometer to determine the corneal topography is described. This method, which is inexpensive and time-saving, is suitable for fitting cosmetic contact lenses or lenses used in treating such corneal pathology as keratoconus.