Pacific University, College of Optometry Forest Grove, Oregon The Prentice Medal Lecture *Read before the Annual Meeting of the American Academy of Optometry, Toronto, Canada, December 12, 1971. For publication in the July, 1972 issue of the American Journal of Optometry and Archives of American Academy of Optometry. †Ph.D., Fellow, American Academy of Optometry.
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Oscar W. Richards (1972) studied this question.