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Relative Effectivity of Foveal and Parafoveal Stimuli in Eliciting Fusion Movements
ELEK LUDVIGH, PhD;
PAULINE McKINNON, PhmB;
LAWRENCE ZAITZEFF, BS
Arch Ophthalmol. 1965;73(1):115-121.
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Introduction
Present opinion seems to be that stimuli presented to the peripheral retinas are more powerful in eliciting fusion movements than are stimuli presented to the foveas.
In an annual review of the literature on strabismus, Parks,1 when discussing an investigation by Nauheim,2 says, "Peripheral fusion is stronger than central fusion. That this is so was not questioned...." Parks then proceeds to discuss an hypothesis to account for the superiority of the peripheral retina. Linksz3 in an annual review of optics and visual physiology quotes Nauheim's * statement that "paramacula targets represent a greater stimulus to fusion than do central targets...." Linksz comments, "(Only in case the author meant 'greater stimulus for fusion movements,' would one, somewhat reluctantly, agree.)"
This belief in the dominance of the peripheral retina has, as its natural consequence, a strong influence on thought concerning strabismus and orthoptic training. Burian4 says, "I believe
. . . [Full Text PDF of this Article]
Author Affiliations
Detroit
From the Kresge Eye Institute.
Footnotes
Submitted for publication May 21, 1964.
This investigation was supported in part by research grant B-3934 from the National Institute of Neurological Diseases and Blindness of the National Institutes of Health, United States Public Health Service.
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