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Article
August 1949

SURGICAL TREATMENT OF CONCOMITANT DIVERGENT STRABISMUS

Author Affiliations

IOWA CITY
From the Department of Ophthalmology, State University of Iowa College of Medicine.

Arch Ophthalmol. 1949;42(2):178-184. doi:10.1001/archopht.1949.00900050183008
Abstract

THE SURGICAL treatment of concomitant exotropia is said not to be as satisfactory as that of esotropia. This does not seem to be true, but it is difficult to predict the exact result of an operation, since the outcome is variable even when the operation is performed by the same surgeon employing the same technic.

Lancaster1 stated that theoretically in correction of squint of lesser degree a 1 mm. movement of muscle insertion should shift the eyeball 2 degrees. Jameson2 and Chavasse3 advocated 1 mm. of recession of the lateral rectus muscle for each 2 degrees of correction desired, but Gifford4 stated that 1 mm. of recession of the lateral rectus results in an average of only 1.5 degrees of correction.

In an effort to determine the average amount of correction resulting from certain operative procedures, statistics were compiled from 49 consecutive cases, in each of

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