VISUAL FIELD DEFECTS IN PREGNANCY

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Abstract
INTRODUCTION In 1922, I read before the International Congress of Ophthalmology, held at Washington, a paper entitled "Bitemporal Contraction of the Visual Field in Pregnancy," with a report of the findings in the visual field in thirty-one cases of normal pregnancy with no ocular lesions, in twenty-two (70.97 per cent) of which there were changes in the limits of the visual field of the nature of bitemporal contraction, which I associated with the normal enlargement of the hypophysis in pregnancy, with a corresponding compression of the chiasm. In this paper I referred to the fact that similar defects had been reported by Bellinzona and Tridontani1 in 1903, and by Forti2 in 1910, A subsequent review of the literature by others and myself showed that Igersheimer,3 in 1916, in an article on the detection of morbid processes in the visual pathways, referred to deformation of the visual

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