Chicago College of Optometry Chicago, Illinois

^*A thesis submitted to the faculty of the Division of Graduate Studies of the Chicago College of Optometry in partial fulfillment of the requirements for the degree of Master of Science in Optometry.

The courtesy and cooperation of the Americna Optical Company is acknowledged.

The loan of their equipment to the Chicago Strabismus Project made this study possible. The author acknowledges the faculty guidance of Dr. Z. B. Schoen and Dr. Thaddeus Murroughs.

Submitted on December 5, 1951, for publication in the December, 1952, issue of the American Journal of Optometry and Archives of American Academy of Optometry.

^†Optometrist and graduate student.