Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Effect of monochromatic aberrations on photorefractive patterns

Not Accessible

Your library or personal account may give you access

Abstract

Photorefractive methods have become popular in the measurement of refractive and accommodative states of infants and children owing to their photographic nature and rapid speed of measurement. As in the case of any method that measures the refractive state of the human eye, monochromatic aberrations will reduce the accuracy of the measurement. Monochromatic aberrations cannot be as easily predicted or controlled as chromatic aberrations during the measurement, and accordingly they will introduce measurement errors. This study defines this error or uncertainty by extending the existing paraxial optical analyses of coaxial and eccentric photorefraction. This new optical analysis predicts that, for the amounts of spherical aberration (SA) reported for the human eye, there will be a significant degree of measurement uncertainty introduced for all photorefractive methods. The dioptric amount of this uncertainty may exceed the maximum amount of SA present in the eye. The calculated effects on photorefractive measurement of a real eye with a mixture of spherical aberration and coma are shown to be significant. The ability, developed here, to predict photorefractive patterns corresponding to different amounts and types of monochromatic aberration may in the future lead to an extension of photorefractive methods to the dual measurement of refractive states and aberrations of individual eyes.

© 1995 Optical Society of America

Full Article  |  PDF Article
More Like This
Geometrical theory to predict eccentric photorefraction intensity profiles in the human eye

Austin Roorda, Melanie C. W. Campbell, and W. R. Bobier
J. Opt. Soc. Am. A 12(8) 1647-1656 (1995)

Geometrical technique to determine the influence of monochromatic aberrations on retinoscopy

Austin Roorda and William R. Bobier
J. Opt. Soc. Am. A 13(1) 3-11 (1996)

Slope-based eccentric photorefraction: theoretical analysis of different light source configurations and effects of ocular aberrations

Austin Roorda, Melanie C. W. Campbell, and William R. Bobier
J. Opt. Soc. Am. A 14(10) 2547-2556 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (14)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved