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December 1953

Alternerende hyperphorie (Alternating Typerphoria).

AMA Arch Ophthalmol. 1953;50(6):795. doi:10.1001/archopht.1953.00920030806024

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This monograph is written in Dutch, and therefore will be read by few American ophthalmologists. The first two chapters cover the basic physiology of ocular movements and optomotor reflexes. Special attention is given to what the author refers to as "Zeeman's theory," which seems to be identical with that of Chavasse, according to which the optomotor reflexes have developed as conditioned reflexes on the basis of the primitive vestibular and proprioceptive mechanisms. The rest of the book concerns the investigation of 113 patients with alternating hyperphoria. The author found that in these cases a hyperphoria could almost always be elicited in lateral versions when the eyes were uncovered. Usually alternating hyperphoria was accompanied by tonic rotatory deviations, in which the covered eye undergoes exorotation and the uncovered one endorotation. Rotatory nystagmus was frequently found, which changed to a horizontal jerking nystagmus when one eye was covered, the fast component of

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