MEASUREMENT OF THE WAVE-FRONT ABERRATION OF THE EYE BY A FAST PSYCHOPHYSICAL PROCEDURE

Citation
Jc. He et al., MEASUREMENT OF THE WAVE-FRONT ABERRATION OF THE EYE BY A FAST PSYCHOPHYSICAL PROCEDURE, Journal of the Optical Society of America. A, Optics, image science,and vision., 15(9), 1998, pp. 2449-2456
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Optics
ISSN journal
1084-7529
Volume
15
Issue
9
Year of publication
1998
Pages
2449 - 2456
Database
ISI
SICI code
1084-7529(1998)15:9<2449:MOTWAO>2.0.ZU;2-3
Abstract
We used a fast psychophysical procedure to determine the wave-front ab errations of the human eye in vivo. We measured the angular deviation of light rays entering the eye at different pupillary locations by ali gning an image of a point source entering the pupil at different locat ions to the image of a fixation cross entering the pupil at a fixed lo cation. We fitted the data to a Zernike series to reconstruct the wave -front aberrations of the pupil. With this technique the repeatability of the measurement of the individual coefficients was 0.019 mu m. The standard deviation of the overall wave-height estimation across the p upil is less than 0.3 mu m. Since this technique does not require the administration of pharmacological agents to dilate the pupil, we were able to measure the changes in the aberrations of the eye during accom modation. We found that administration of even a mild dilating agent c auses a change in the aberration structure of the eye. (C) 1998 Optica l Society of America.