Anopsia

An anopsia (or anopia) is a defect in the visual field. If the defect is only partial, then the portion of the field with the defect can be used to isolate a lesion.

Types of partial anopsia:
 * Binasal hemianopsia
 * Bitemporal hemianopsia
 * Homonymous hemianopsia
 * Quadrantanopia