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F. H. Verhoeff, M.D.
Boston.

Arch Ophthal. 1941;26(5):914.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor:

—Probably Dr. Loewenstein and Dr. Donald would not have written their paper, "A Color Stereoscopic Phenomenon," which appears in your October issue (ARCH. OPHTH. 26: 553, 1941) if they had run across my much shorter paper of thirteen years ago (Verhoeff, F. H. : An Optical Illusion Due to Chromatic Aberration, Am. J. Ophth. 11: 898, 1928). I not only described the phenomenon about which they speculate but pointed out features of it which they overlook or misunderstand. Moreover, I clearly demonstrated that it is dependent on two optical factors, chromatic aberration and eccentricity of the lens system, while they attribute it in great part to some obscure psychologic cause. I also pointed out that the eccentricity can be provided by artificial means when, as is sometimes the case, a person does not possess a sufficient amount of it to permit him to observe the phenomenon. This fact . . . [Full Text PDF of this Article]

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