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Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 6 — Jun. 13, 2006

Integration of local motion is normal in amblyopia

Robert F. Hess, Behzad Mansouri, Steven C. Dakin, and Harriet A. Allen  »View Author Affiliations

JOSA A, Vol. 23, Issue 5, pp. 986-992 (2006)

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We investigate the global integration of local motion direction signals in amblyopia, in a task where performance is equated between normal and amblyopic eyes at the single element level. We use an equivalent noise model to derive the parameters of internal noise and number of samples, both of which we show are normal in amblyopia for this task. This result is in apparent conflict with a previous study in amblyopes showing that global motion processing is defective in global coherence tasks [ Vision Res. 43, 729 (2003) ]. A similar discrepancy between the normalcy of signal integration [ Vision Res. 44, 2955 (2004) ] and anomalous global coherence form processing has also been reported [ Vision Res. 45, 449 (2005) ]. We suggest that these discrepancies for form and motion processing in amblyopia point to a selective problem in separating signal from noise in the typical global coherence task.

© 2006 Optical Society of America

OCIS Codes
(330.4150) Vision, color, and visual optics : Motion detection
(330.5000) Vision, color, and visual optics : Vision - patterns and recognition
(330.5510) Vision, color, and visual optics : Psychophysics
(330.7310) Vision, color, and visual optics : Vision

ToC Category:
Vision and color

Original Manuscript: July 1, 2005
Manuscript Accepted: September 30, 2005

Virtual Issues
Vol. 1, Iss. 6 Virtual Journal for Biomedical Optics

Robert F. Hess, Behzad Mansouri, Steven C. Dakin, and Harriet A. Allen, "Integration of local motion is normal in amblyopia," J. Opt. Soc. Am. A 23, 986-992 (2006)

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