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School of Optometry, University of California Berkeley, California *Read before the First Colombian Congress of Optometry, Bogota, D.E., Colombia, December 14, 1962. For publication in the March, 1964, issue of the AMERICAN Journal of Optometry and Archives of American Academy of Optometry. †Optometrist, Ph.D., Fellow, American Academy of Optometry. P.O. Box 8 Ojai, Calif.
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Monroe J. Hirsch (1964) studied this question.
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