Variability of wavefront aberration measurements in small pupil sizes using a clinical Shack-Hartmann aberrometer.

ABSTRACT:

Background

Recently, instruments for the measurement of wavefront aberration in the living human eye have been widely available for clinical applications. Despite the extensive background experience on wavefront sensing for research purposes, the information derived from such instrumentation in a clinical setting should not be considered a priori precise. We report on the variability of such an instrument at two different pupil sizes.

Methods

A clinical aberrometer (COAS Wavefront Scienses, Ltd) based on the Shack-Hartmann principle was employed in this study. Fifty consecutive measurements were performed on each right eye of four subjects. We compared the variance of individual Zernike expansion coefficients as determined by the aberrometer with the variance of coefficients

SUBMITTER: Ginis HS 

PROVIDER: S-EPMC362876 | biostudies-literature | 2004 Feb

REPOSITORIES: biostudies-literature