In January 1932 the problem of determining the efficiency of the nonsurgical treatment of strabismus was presented to the Northwestern University Medical School by the Section on Ophthalmology of the American Medical Association and the American Academy of Ophthalmology and Otolaryngology. To study this problem an orthoptic clinic was begun at Northwestern University under the supervision of Dr. Sanford Gifford, and a second clinic was established at the Children's Memorial Hospital under the supervision of Dr. Richard Gamble. From these clinics five hundred and seven patients with concomitant squint have been treated by nonsurgical methods, and records of their progress or lack of progress recorded.
The data from these clinics are included in several papers by me.1
The purpose of this paper, however, is not to discuss the data but to emphasize: (1) the difference between the normal ocular deviations and strabismus, (2) the fact that concomitant squint usually