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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. 16, Iss. 10 — Oct. 1, 1999
  • pp: 2363–2369

Comparison of cone directionality determined by psychophysical and reflectometric techniques

J. C. He, S. Marcos, and S. A. Burns  »View Author Affiliations


JOSA A, Vol. 16, Issue 10, pp. 2363-2369 (1999)
http://dx.doi.org/10.1364/JOSAA.16.002363


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Abstract

We measured the directionality of the cones with both a psychophysical (Stiles–Crawford I) technique and an optical technique. The two sets of measurements were made in the same subjects, with stimuli as similar as possible used. The two types of measurements gave similar estimates of the location in the pupil toward which the cones were optimally aligned. However, the two measurements gave quite dissimilar estimates of the width of the directional sensitivity. On average, optical measurements were half as broad as psychophysical measurements in the fovea, but there were substantial individual differences. At 2-deg retinal eccentricity the difference between techniques was even more marked.

© 1999 Optical Society of America

OCIS Codes
(330.1690) Vision, color, and visual optics : Color
(330.4300) Vision, color, and visual optics : Vision system - noninvasive assessment
(330.5310) Vision, color, and visual optics : Vision - photoreceptors
(330.7310) Vision, color, and visual optics : Vision

History
Original Manuscript: May 21, 1999
Manuscript Accepted: June 7, 1999
Published: October 1, 1999

Citation
J. C. He, S. Marcos, and S. A. Burns, "Comparison of cone directionality determined by psychophysical and reflectometric techniques," J. Opt. Soc. Am. A 16, 2363-2369 (1999)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-16-10-2363

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