Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4036779 | Vision Research | 2005 | 12 Pages |
Abstract
To better understand the nature of the cortical deficit in amblyopia we undertook a systematic investigation of second-order processing in 8 amblyopic and 8 normal observers. We investigated local detection, discrimination and global integration. Our local stimulus consisted of a Gaussian patch of fractal noise multiplied by a 1-d sinusoidal modulator. Our global stimulus consisted of an array of such elements.We revealed second-order detection deficits for stimuli with equi-visible carriers. Orientation discrimination for an isolated second-order patch was comparable in normal and amblyopic eyes. We showed that pure integration of second-order patterns can be normal in amblyopia.
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Authors
Behzad Mansouri, Harriet A. Allen, Robert F. Hess,