Orientation variance discrimination in amblyopia

B Mansouri, RE Hess, Harriet Allen

Research output: Contribution to journalArticle

3 Citations (Scopus)


Our previous results showed that while amblyopes can efficiently integrate visual signals, they are poor at segregating signals in noise. This could be either because integration detectors have broader bandwidths or because of a selective extrastriate segregation anomaly. One consequence of the former would be poorer variance discrimination. Using a two-alternative forced-choice paradigm, observers were asked to judge the orientational variance for arrays of 16 Gabors. All observers, be they normal or amblyopic, could perform the task similarly, although at high spatial frequencies, amblyopic eyes needed slightly more incremental variance than the normal eyes. We conclude that normals and amblyopes integrate signals in a similar way. (c) 2007 Optical Society of America
Original languageEnglish
Pages (from-to)2499-2504
Number of pages6
JournalOptical Society of America. Journal A: Optics, Image Science, and Vision
Issue number9
Early online date1 Jan 2007
Publication statusPublished - 1 Jan 2007


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