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

Influence of amount and changes in axis of astigmatism on retinal image quality

Not Accessible

Your library or personal account may give you access

Abstract

We measured retinal image quality in astigmatic eyes, using the double-pass technique. We analyzed the influence of the amount of astigmatism and changes in axis of astigmatism on the eye’s optical performance. Different amounts of astigmatism were obtained by variation of the cylindrical power of a lens situated in front of the eye, between 0.25-diopter (D) overcorrection and 1-D undercorrection at intervals of 0.25 D. Changes in the axis of astigmatism were obtained by rotation of the lens, which neutralizes the astigmatism in an angle of ±10° at 5° intervals. The results show the decrease in retinal image quality and the increase in the degree of image astigmatism obtained when the amount of astigmatism increases or the angle between the lens and the eye axis is other than zero. In general, the largest variations correspond to when the astigmatism changes from 0 to 0.25 D or when the axis changes from 0° to ±5°. The reduction in optical performance is smaller in living eyes than in an eye model or in an artificial eye. The aberrations present in the living eye reduce the relative loss of retinal image quality introduced by astigmatism.

© 1998 Optical Society of America

Full Article  |  PDF Article
More Like This
Statistical variation of aberration structure and image quality in a normal population of healthy eyes

Larry N. Thibos, Xin Hong, Arthur Bradley, and Xu Cheng
J. Opt. Soc. Am. A 19(12) 2329-2348 (2002)

Effects of aging in retinal image quality

Pablo Artal, Manuel Ferro, Ismael Miranda, and Rafael Navarro
J. Opt. Soc. Am. A 10(7) 1656-1662 (1993)

Aberrations and retinal image quality of the normal human eye

Junzhong Liang and David R. Williams
J. Opt. Soc. Am. A 14(11) 2873-2883 (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 (9)

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

Tables (2)

You do not have subscription access to this journal. Article tables 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