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December 1942

Binocular Imbalance.

Arch Ophthalmol. 1942;28(6):1125. doi:10.1001/archopht.1942.00880120189015

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In this volume the author "has endeavored to show how a correct relationship between the relative amplitudes of convergence and accommodation can be obtained." It is divided into fifteen short chapters and an index. It opens with an elementary discussion on binocular vision and the extraocular muscles. In the following chapter, on convergence, one finds the statement that "all lateral imbalances are errors of convergence and all tests are convergence tests," yet later, in the chapter on esophoria, the diagnostic features of divergence insufficiency are outlined. Even though the author does believe that no active divergence is possible, such apparently conflicting statements are confusing to the beginner. The principles of retinoscopy, both static and dynamic, are clearly outlined. The treatment of the various types of heterophoria is given, with special emphasis on the value of stereoscopic training. The concluding chapter is a general survey of the author's opinions on the

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