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Science 15 October 1971:
Vol. 174. no. 4006, pp. 302 - 305
DOI: 10.1126/science.174.4006.302
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Articles

Anomalous Retinal Pathways in the Siamese Cat: An Inadequate Substrate for Normal Binocular Vision

Ronald E. Kalil 1, Sonal R. Jhaveri 1, and Whitman Richards 1

1 Department of Psychology, Massachusetts Institute of Technology, Cambridge 02139

All major retinal pathways in the Siamese cat are abnormal, with almost total crossing of the projections to the pretectum and superior colliculus. These projections represent a marked disruption in the customary neural substrate for binocular vision, which implies a consequent impairment in stereoscopic depth perception. Crossed eyes, commonly seen in the Siamese cat, may therefore arise from a neuroanatomical defect in the primary visual pathways.


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