<unk> , or<unk> , is a loss of 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 tumor, and trauma. This article deals only with permanent<unk> , and not with transitory or temporary<unk> , as identified by William Wollaston PRS in 1824. Temporary<unk>  can occur in the aura phase of migraine.
Hemianopsia
Agraphesthesia
Dysmorphopsia
Pelopsia
Photopsia
Finger agnosia
Ophthalmoparesis
Homonymous hemianopsia