A patient is presented who had a homonymous hemianopsia after a grand mal seizure. The patient had a histologically proven glioblastoma multiforme and it was believed initially that the visual field defect was due to extension of the tumor. The deficit in the visual field cleared completely after one month's time.
Salmon JH. Transient Postictal Hemianopsia. Arch Ophthalmol. 1968;79(5):523–525. doi:10.1001/archopht.1968.03850040525004
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