Transactions . ourse, be determined, since it wassituated in the lost portion of the field. From the sketch of eachfield it will be seen that the line of blindness is vertical above thepoint of fixation, but that it diverges towaids the blind side a shortdistance above it, describes a half circle, and returns to the verticalline below, from which it descends towards the left for fifteen inches,then rises to the horizontal line, and thence passes upwards, and tothe left to the periphery of the field. In the case published in 1871, itseemed that at the region of the fovea, the elements from each
Transactions . ourse, be determined, since it wassituated in the lost portion of the field. From the sketch of eachfield it will be seen that the line of blindness is vertical above thepoint of fixation, but that it diverges towaids the blind side a shortdistance above it, describes a half circle, and returns to the verticalline below, from which it descends towards the left for fifteen inches,then rises to the horizontal line, and thence passes upwards, and tothe left to the periphery of the field. In the case published in 1871, itseemed that at the region of the fovea, the elements from each sideof the brain might be intermingled, and that thus the full V. mightbe accounted for in cases where severe lesions were known to haveoccurred in one hemisphere. An eflbrt was made to test this idea inthis case where the loss of a quadrant of each field was only felt as 338 an inconvenience, and where there was the full acuity of vision at thepoint of fixation, and at the same time, to measure the dimensions. of the space where sharp sight yet remained. The man was a car-penter, accustomed to .make careful observations, and I chose a tooltith which he was familiar. An ordinary rule, with the foot-scale
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectophthalmology, bookye
