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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Levi, D. M. Popple, A. V. |
| Description | Author Affiliation: Popple AV ( College of Optometry, University of Houston, Houston, TX 77204-6052, USA. ariella.popple@brunel.ac.uk); |
| Abstract | Amblyopia ('lazy eye') is an impairment in visual acuity resulting from abnormal neural development in the visual cortex. We tested the responses of ten amblyopic and six normal observers to illusions of perceived orientation in textures of Gabor patches: the 'Fraser illusion,' the 'phase illusion,' and a 'tilted chain' illusion. The illusory tilt of the stimulus rows was matched by actual tilt in the opposite direction by using the method of constant stimuli. Amblyopes showed a significant increase in the Fraser illusion, a decrease in the phase illusion, and a reversal of the tilted chain illusion. Amblyopic performance could be simulated in normal observers by reducing the length of the rows. These results can be modeled by a theory which places the neural abnormality in amblyopia at the level of second stage grouping processes. Additionally, the illusions might be useful in the early diagnosis of amblyopia without the need for prior refractive correction. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 21 |
| Volume Number | 97 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2000-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Amblyopia Physiopathology Visual Perception Case-Control Studies Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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