Illinois College of Optometry Chicao, Illinois *Submitted on October 8, 1955, for publication in the February, 1956, issue of the AMERICAN JOURNAL OF OPTOMETRY AND ARCHIVES OF AMERICAN ACADEMY OF OPTOMETRY. †Optometrist. M.S., D.O.S., Chairman, Department of Biological Sciences. Fellow, American Academy of Optometry.
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David D. Michaels (1956) studied this question.