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January 1971

Reduction of Ocular Torque by Medial Rectus Recession

Author Affiliations

Iowa City
From the Department of Ophthalmology, University of Iowa, College of Medicine, Iowa City.

Arch Ophthalmol. 1971;85(1):13-17. doi:10.1001/archopht.1971.00990050015003

A prevalent concept in strabismus surgery is that excessive recessions cripple an extraocular muscle because of a decrease in mechanical advantage. The mathematical analysis presented, coupled with length-tension diagrams, supports my hypothesis that gross underactions of muscles excessively recessed are due primarily to a marked decrease in the force of contraction rather than a marked loss in mechanical advantage.

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