Abstract

We have measured refractive error through a succession of small regions of the cornea. In these initial measurements approximately twenty regions of 1 mm diameter are selected for each measured eye. For experimental convenience, the regions are chosen along vertical horizontal and 45 degree oblique meridia through a central point near the comeal apex. Refractive error at each locus is determined by a variant of the Scheiner principle.

© 1991 Optical Society of America