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. (c) 2005 Elsevier Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 2449-2460 |
Number of pages | 12 |
Journal | Vision Research |
Volume | 18 |
Issue number | 45 |
DOIs | |
Publication status | Published - 1 Aug 2005 |
Keywords
- orientation
- discrimination
- second-order
- integration
- amblyopia