Graphic presentation of computer-analyzed keratoscope photographs.

We describe a corneal topography analysis system that creates accurate high-resolution graphics of corneal surface power from computer analysis of keratoscope photographs, and we present several examples of corneal shape analyses. The major improvement in the updated version presented here is the development of a contour map of corneal surface power. Improvements in computer algorithms used to analyze the raw data obtained from the keratoscope photographs have also been made, resulting in increased accuracy. This system allows the ophthalmologist to see the patterns of power distribution on the corneal surface more easily than is possible by visual inspection of keratoscope photographs. Improved corneal topography analysis should find wide clinical application in the study of refractive corneal surgery techniques and in the study of corneal disorders that cause irregular astigmatism.