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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. 10, Iss. 7 — Jul. 1, 1993
  • pp: 1611–1623

Parametric representation of Stiles–Crawford functions: normal variation of peak location and directionality

Raymond A. Applegate and Vasudevan Lakshminarayanan  »View Author Affiliations


JOSA A, Vol. 10, Issue 7, pp. 1611-1623 (1993)
http://dx.doi.org/10.1364/JOSAA.10.001611


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Abstract

Evidence suggests that the psychophysically determined Stiles–Crawford effect of the first kind (SCE) reflects waveguide properties of human photoreceptors. The peak of the SCE data set is assumed to reflect the principal alignment tendencies, and the spread (e.g., ρ value, the curvature or width at half-height) is assumed to reflect the directionality (i.e., interreceptor differences in alignment) of the population of photoreceptors being tested. As such, disruption of the normal SCE can be used and/or has been used (1) to document early natural history of retinal pathology involving the photoreceptors, (2) to provide a firm rationale for therapeutic intervention, and (3) to provide a method for monitoring therapies designed to alter the natural course of retinal-disease processes. We report large-sample norms for foveal SCE peak location and spread (horizontal peak location, nasal 0.51 ± 0.72, horizontal ρ value 0.047 ± 0.013, vertical peak location, superior 0.20 ± 0.64, vertical ρ value 0.053 ± 0.012), compare these norms with values determined in other laboratories, and discuss the various mathematical forms used for the empirical description of SCE data sets.

© 1993 Optical Society of America

History
Original Manuscript: August 21, 1992
Revised Manuscript: January 11, 1993
Manuscript Accepted: January 11, 1993
Published: July 1, 1993

Citation
Raymond A. Applegate and Vasudevan Lakshminarayanan, "Parametric representation of Stiles–Crawford functions: normal variation of peak location and directionality," J. Opt. Soc. Am. A 10, 1611-1623 (1993)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-10-7-1611

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