Design and Validation of a Scanning Shack Hartmann Aberrometer for Measurements of the Eye over a Wide Field of View

Overview

Journal Opt Express

Specialties Biophysics
Ophthalmology

Date 2010 Feb 23

PMID 20173936

Citations 9

Authors

Xin Wei

Larry Thibos

Affiliations

Soon will be listed here.

Abstract

Peripheral vision and off-axis aberrations not only play an important role in daily visual tasks but may also influence eye growth and refractive development. Thus it is important to measure off-axis wavefront aberrations of human eyes objectively. To achieve efficient measurement, we incorporated a double-pass scanning system with a Shack Hartmann wavefront sensor (SHWS) to develop a scanning Shack Hartmann aberrometer (SSHA). The prototype SSHA successfully measured the off-axis wavefront aberrations over +/- 15 degree visual field within 7 seconds. In two validation experiments with a wide angle model eye, it measured change in defocus aberration accurately (<0.02microm, 4mm pupil) and precisely (<0.03microm, 4mm pupil). A preliminary experiment with a human subject suggests its feasibility in clinical applications.

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