====== Hemianopsia ====== [[Hemianopsia]], or hemianopia, is a decreased vision or [[blindness]] ([[anopsia]]) in half the [[visual field]], usually on one side of the vertical midline. The most common causes of this damage are [[stroke]], brain tumors, and trauma. ===== Bitemporal hemianopsia ===== [[Bitemporal hemianopsia]]. ===== Homonymous hemianopsia ===== [[Homonymous hemianopsia]].