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On the Precise Objective Determination of Eye Movements
GEORGE T. TANI, M.D.;
KENNETH N. OGLE, Ph.D.;
REX W. WEAVER, M.D.;
THEODORE G. MARTENS, M.D.
AMA Arch Ophthalmol. 1956;55(2):174-185.
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In the usual course of a prism-vergence test, the eyes are slowly forced to converge (or diverge) until the subject reports that he sees the test object double. Then the prismatic power is slowly decreased, and, at a certain point, fusion of the double images is suddenly regained. Just at this moment when recovery of fusion takes place, the two double images must have attained a certain critical separation, which is capable of initiating fusional movements of the eyes to overcome the diplopia. If, just at the moment of recovery, one of the double images falls in the fovea of one eye, the other image will necessarily fall extrafoveally on the retina of the other eye at a certain angle, an angle of disparity, which is one dimension of the so-called perimacular fusional area.1 It has been generally assumed that in the prism-vergence tests, as soon as the images
. . . [Full Text PDF of this Article]
Author Affiliations
Rochester, Minn.
Fellow in Ophthalmology (Dr. Tani); Section of Biophysics and Biophysical Research (Dr. Ogle); Fellow in Ophthalmology (Dr. Weaver), and Section of Ophthalmology (Dr. Martens), Mayo Clinic and Mayo Foundation. The Mayo Foundation, Rochester, Minn., is a part of the Graduate School of the University of Minnesota.
Footnotes
Received for publication Nov. 14, 1955.
The broad body of data on which this paper was based constituted material from which Drs. Tani and Weaver produced theses submitted to the Faculty of the Graduate School of the University of Minnesota in partial fulfilment of the requirements for the degree of Master of Science in Ophthalmology.
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