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February 1957

An Analysis of the General Type of Uniocular Rotations

Author Affiliations

Southbridge, Mass.

AMA Arch Ophthalmol. 1957;57(2):200-206. doi:10.1001/archopht.1957.00930050210006

Introduction  Much in the recent literature on oculorotations and Listing's law is concerned with the "false torsion" that occurs in oblique positions of the globe and with removing the misunderstandings to which this concept has given rise. The emphasis has been on oculorotations around axes in Listing's plane, and, with the aid of models and photographs of such, this type of oculorotation, from the primary position to any other, has largely been settled, although some confusion persists.1It is different with oculorotations starting from positions other than the primary position. Here misconceptions are still deeply rooted—no doubt, because of the intricacy of analyzing the general case.2-4 Thus, for instance, Tschermak-Seysenegg,5 who constructed several ingenious models in order to elucidate the simple case of oculorotations, states in regard to the movements around secondary axes, "Every movement other than a primary radial one, whether starting from the primary or

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