Key points are not available for this paper at this time.
School of Optometry, University of California Berkeley, California *Read before the annual meeting of the American Academy of Optometry, Chicago, Illinois, December 8, 1953. For publication in the May, 1954, issue of the American Journal of Optometry and Archives of American Academy of Optometry. †Optometrist. Ph.D. Member of faculty. Fellow, American Academy of Optometry.
Meredith W. Morgan (1954) studied this question.