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June 1936


Author Affiliations

Vassar College, Poughkeepsie, N. Y.

Arch Ophthalmol. 1936;15(6):1117. doi:10.1001/archopht.1936.00840180161014

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To the Editor:—Dr. F. H. Verhoeff, in his article entitled "A New Theory of Binocular Vision," in the February 1935 issue of the Archives (vol. 13, p. 151), made the following statement: "The fact that perception of depth may still occur when disparate images are seen as two and no movement and rivalry are perceptible disproves the theory recently advanced by Washburn." The reference is to my article, "Retinal Rivalry as a Neglected Factor in Stereoscopic Vision," in the Proceedings of the National Academy of Sciences (19:773, 1933). Dr. Verhoeff evidently read it as, "Retinal Rivalry as the Cause of Stereoscopic Vision." There are, of course, several factors, any one of which acting alone or with others will produce the impression of solidity or depth.

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