FUSIONAL MOVEMENTS IN PERMANENT STRABISMUS

Abstract

I. INTRODUCTION 1. PHYSIOLOGIC BASIS OF BINOCULAR VISION Concomitant strabismus is never a purely mechanical anomaly. Innervational factors play a large part in its causation, and the faulty position of the eyes is always accompanied by a severe disturbance of the sensorial functions and the binocular cooperation of the eyes.¹It would be wrong, however, to assume that all sensorial cooperation between the two eyes ceases when manifest concomitant strabismus sets in. A more or less rudimentary sensorial cooperation can be demonstrated in all cases. The sensorial behavior of the eyes in normal and in anomalous conditions has been studied thoroughly, and there is today, a good general understanding of the visual act in squint. But many phases remain unexplained and many questions unanswered. The great biologic significance of the visual act in squint and its importance for the diagnosis and treatment in clinical cases warrant further investigation. At