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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 31, Iss. 3 — Mar. 1, 2014
  • pp: 524–531

Crystalline lens thickness determines the perceived chromatic difference in magnification

Yun Chen and Frank Schaeffel  »View Author Affiliations

JOSA A, Vol. 31, Issue 3, pp. 524-531 (2014)

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Since the origin of the high interindividual variability of the chromatic difference in retinal image magnification (CDM) in the human eye is not well understood, optical parameters that might determine its magnitude were studied in 21 healthy subjects with ages ranging from 21 to 58 years. Two psychophysical procedures were used to quantify CDM. They produced highly correlated results. First, a red and a blue square, presented on a black screen, had to be matched in size by the subjects with their right eyes. Second, a filled red and blue square, flickering on top of each other at 2 Hz, had to be adjusted in perceived brightness and then in size to minimize the impression of flicker. CDM varied widely among subjects from 0.0% to 3.6%. Biometric ocular parameters were measured with low coherence interferometry and crystalline lens tilt and decentration with a custom-built Purkinjemeter. Correlations were studied between CDM and corneal power, anterior chamber depth, lens thickness, lens tilt and lens decentration, and vitreous chamber depths. Lens thickness was found significantly correlated with CDM and accounted for 64% of its variance. Vertical lens tilt and decentration were also significantly correlated. It was also found that CDM increased by 3.5% per year, and part of this change can be attributed to the age-related increase in lens thickness.

© 2014 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1690) Vision, color, and visual optics : Color
(330.5370) Vision, color, and visual optics : Physiological optics
(330.4595) Vision, color, and visual optics : Optical effects on vision

ToC Category:
Vision, Color, and Visual Optics

Original Manuscript: October 21, 2013
Manuscript Accepted: December 19, 2013
Published: February 13, 2014

Virtual Issues
Vol. 9, Iss. 5 Virtual Journal for Biomedical Optics

Yun Chen and Frank Schaeffel, "Crystalline lens thickness determines the perceived chromatic difference in magnification," J. Opt. Soc. Am. A 31, 524-531 (2014)

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