CORNEAL TOPOGRAPHY MEASURING METHOD AND CORNEAL TOPOGRAPHY MEASUREMENT APPARATUS

摘要

PPROBLEM TO BE SOLVED: To provide a novel corneal topography measuring method which can measure a corneal topography with high accuracy and reliability using a placido ring. PSOLUTION: A ring image-photographing device 10 using the placido ring and a corneal section-imaging device 11 which images a shape of the corneal section are employed in combination. An actually measured position of a ring image with high measurement accuracy is basically employed, while correction is conducted based on the virtual position of the ring image estimated on the basis of a corneal section image, whereby a significant error can be avoided in estimating the corneal topography (curvature) based on the actually measured position of the ring image. PCOPYRIGHT: (C)2011,JPO&INPIT