Customized rigid gas permeable lens fitting for keratoconus

Keratoconus, a non-inflammatoryectasic disorder of the cornea, with corneal thinning and distortion resulting high degree of irregular myopic astigmatism. To best correct patients' vision with keartoconus, one would require Rigid Gas Permeable contact lens. Due to the distorted shape of cornea, the correction of keratoconus remains one of the most difficult challenges in the art of contact lens fitting. In this paper, we trialed and fitted a newly diagnosed bilateral keatoconus patient with many different parameters in order to reach a final appropriate lens design for maintaining the patient's minimum binocularity and improving his visual acuity as much as possible. The patient was in his early 30's with no previous knowledge of kearotoconus and came in to our center for a pre-Lasik evaluation. Diagnosis of the disorder was confirmed by axial map and ring verification of corneal topography. The final treatment of course included special designs of rigid gas permeable lenses for both eyes. Patient was very impressed with result which allows his vision to improve 4 lines in both OD and OS on the vision test chart.