Detection, discrimination and integration of second-order orientation information in strabismic and anisometropic amblyopia

نویسندگان

  • Behzad Mansouri
  • Harriet A. Allen
  • Robert F. Hess
چکیده

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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عنوان ژورنال:
  • Vision Research

دوره 45  شماره 

صفحات  -

تاریخ انتشار 2005