. Medical and surgical therapy . s not appear as a black patch in the fieldof vision, and is consequently nearly always un-perceived by the patient. It is usually absolute, theloss of vision within its area being complete. Some-times, but much more rarely, the scotoma is onlyrelative, the visibility of the white index only diminish-ing instead of disappearing altogether during part ofits passage. These scotomata appear in all sorts ofshapes, though they may extend over only a fewdegrees. Their number, as well as their positionrelatively to the fixation point, is very variable. Theycan be divid
. Medical and surgical therapy . s not appear as a black patch in the fieldof vision, and is consequently nearly always un-perceived by the patient. It is usually absolute, theloss of vision within its area being complete. Some-times, but much more rarely, the scotoma is onlyrelative, the visibility of the white index only diminish-ing instead of disappearing altogether during part ofits passage. These scotomata appear in all sorts ofshapes, though they may extend over only a fewdegrees. Their number, as well as their positionrelatively to the fixation point, is very variable. Theycan be divided into three classes : (a) macular andparamacular scotomata, (b) pure macular scotomata,and (c) peripheral scotomata. In most cases the siteof the wound is in the immediate neighbourhoodof the external occipital protuberance, either in themedian line or slightly on one side of it. According WOUXDS OF THE OCCIPITAL LOBE 697 to the descriptions of operations or the informationobtained by radiography, there is often damage to 1) G.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1918
