SOME OBSERVATIONS ON THE VISUAL FIELDS IN HYDROCEPHALUS

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Abstract
Changes in the visual fields thought to be due to dilatation of the 3rd ventricle with resulting pressure on the optic nerve are described in a series of patients in whom visual loss due to secondary optic atrophy could be excluded. Considerable variation was observed. This was due to stages in a progressive process. Various combinations of depressive and scotomatous involvement of the visual field are described. Over 1/2 the patients studied showed a progressive loss of the lower temporal quadrant accompanied by a pronounced "greying" of the white test object throughout the quadrant effected. Later the upper temporal quadrant begins a similar sequence of events but in no case did the process go on to complete bitemporal hemiopia before the changes of secondary optic atrophy became manifest. Mechanical factors in the production of these changes are discussed.