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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 15, Iss. 9 — Sep. 1, 1998
  • pp: 2514–2521

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

Jaume Pujol, Montserrat Arjona, Josep Arasa, and Victoria Badia  »View Author Affiliations


JOSA A, Vol. 15, Issue 9, pp. 2514-2521 (1998)
http://dx.doi.org/10.1364/JOSAA.15.002514


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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

OCIS Codes
(330.4300) Vision, color, and visual optics : Vision system - noninvasive assessment
(330.5370) Vision, color, and visual optics : Physiological optics
(330.7310) Vision, color, and visual optics : Vision

History
Original Manuscript: December 1, 1997
Revised Manuscript: March 13, 1998
Manuscript Accepted: March 20, 1998
Published: September 1, 1998

Citation
Jaume Pujol, Montserrat Arjona, Josep Arasa, and Victoria Badia, "Influence of amount and changes in axis of astigmatism on retinal image quality," J. Opt. Soc. Am. A 15, 2514-2521 (1998)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-15-9-2514

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