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 the underlying cause. It is particularly used to describe the lack of sight in one eye.
__TOC__ Variants Types of partial anopsia include: Hemianopsia Homonymous hemianopsia Heteronymous hemianopsia Binasal hemianopsia Bitemporal hemianopsia Superior hemianopia Inferior hemianopia Quadrantanopia
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