Corneal Biophysics Laboratory, School of Optometry The Ohio State University, Columbus, Ohio *Submitted on December 28, 1966, for publication in the May, 1967, issue of the American Journal of Optometry and Archives of American Academy of Optometry. †Optometrist. Ph.D., Associate Professor. Fellow, American Academy of Optometry. ‡Optometrist. B.Sc., Graduate Research Assistant.