Anopsia
Encyclopedia
An anopsia 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:
Visual field
The term visual field is sometimes used as a synonym to field of view, though they do not designate the same thing. The visual field is the "spatial array of visual sensations available to observation in introspectionist psychological experiments", while 'field of view' "refers to the physical...
. 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:
- HemianopsiaHemianopsiaHemianopia, or hemianopsia, is a type of anopsia where the decreased vision or blindness takes place in half the visual field of one or both eyes. In most cases, the visual field loss respects the vertical midline...
- Homonymous hemianopsiaHomonymous hemianopsiaHemianopsia or hemianopia is visual field loss that respects the vertical midline, and usually affects both eyes, but can involve one eye only. Homonymous hemianopsia, or homonymous hemianopia occurs when there is hemianopic visual field loss on the same side of both eyes...
- Heteronymous hemianopsia
- Binasal hemianopsiaBinasal hemianopsiathumb|Paris as seen with full visual fieldsthumb|Binasal hemianopsia is the medical description of a type of partial blindness where vision is missing in the inner half of both the right and left visual field...
- Bitemporal hemianopsiaBitemporal hemianopsiaBitemporal hemianopsia is the medical description of a type of partial blindness where vision is missing in the outer half of both the right and left visual field...
- Binasal hemianopsia
- Superior hemianopia
- Inferior hemianopia
- Homonymous hemianopsia
- QuadrantanopiaQuadrantanopiaQuadrantanopia, quadrantanopsia, or quadrant anopia refers to an anopia affecting a quarter of the field of vision.It can be associated with a lesion of an optic radiation...