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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. 19, Iss. 6 — Jun. 1, 2002
  • pp: 1073–1083

Influence of Stiles–Crawford apodization on visual acuity

David A. Atchison, Dion H. Scott, Niall C. Strang, and Pablo Artal  »View Author Affiliations


JOSA A, Vol. 19, Issue 6, pp. 1073-1083 (2002)
http://dx.doi.org/10.1364/JOSAA.19.001073


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Abstract

The Stiles–Crawford effect (SCE) of the first kind has often been considered to be important to spatial visual performance in that it ameliorates the influence of defocus and aberrations. We investigated the influence of SCE apodization on visual acuity as a function of defocus (out to ±2 D) in four subjects. We used optical filters, conjugate with the eye’s entrance pupil, that neutralized or doubled the existing SCE. With an illiterate-E task, the influence of the SCE was more noticeable for myopic defocus than for hypermetropic defocus, was generally more noticeable for high-contrast than for low-contrast letters, and increased with increase in pupil size. The greatest influence on visual acuity of neutralizing the SCE, across the subjects and range of conditions, was deterioration of 0.06 (4-mm pupil), 0.16 (6-mm pupil), and 0.29 log unit (7.6-mm pupil).

© 2002 Optical Society of America

OCIS Codes
(330.1070) Vision, color, and visual optics : Vision - acuity
(330.5370) Vision, color, and visual optics : Physiological optics

Citation
David A. Atchison, Dion H. Scott, Niall C. Strang, and Pablo Artal, "Influence of Stiles–Crawford apodization on visual acuity," J. Opt. Soc. Am. A 19, 1073-1083 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-6-1073


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