Heteronymous hemianopia.This type of hemianopia is caused by a lesion on your optic chiasm. This is the area in your brain where the optic nerves cross and form an “X.” The two types of heteronymous hemianopia are bitemporal and binasal. Bitemporal hemianopia is when you lose vision...
Hemianopia is a vision defect in which half of the field of vision of the eye is affected by reduced vision. The main causes of...