IMPROVED SEQUENTIAL SCANNING WAVEFRONT MEASUREMENT AND RETINAL TOPOGRAPHY

摘要

An improved sequential scanning method and apparatus for measuring wavefront aberration involves angularly displacing a measurement beam from a parallel beam striking the corneal surface at a desired location and using the displacement of an image on a detector between the angularly displaced beam and a reference beam to obtain a more accurate wavefront measurement than provided by the displacement between the parallel beam and a reference beam conventionally used for such wavefront aberration measurement. A method and related apparatus for determining a retinal topography relies on using the improved measurement method and apparatus in conjunction with other ocular data to determine changes in the bulbous length of the eye based upon retina l image displacement.