An anopsia () is a defect in the
visual field
The visual field is the "spatial array of visual sensations available to observation in introspectionist psychological experiments". Or simply, visual field can be defined as the entire area that can be seen when an eye is fixed straight at a point ...
. If the defect is only partial, then the portion of the field with the defect can be used to isolate the underlying cause.
Types of partial anopsia:
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Hemianopsia
Hemianopsia, or hemianopia, 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 wi ...
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Homonymous hemianopsia
Hemianopsia, or hemianopia, is a visual field loss on the left or right side of the vertical midline. It can affect one eye but usually affects both eyes.
Homonymous hemianopsia (or homonymous hemianopia) is hemianopic visual field loss on the sa ...
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Heteronymous hemianopsia
Hemianopsia, or hemianopia, 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 wi ...
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Binasal hemianopsia
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. It is associated with certain lesions of the eye and of the central nervous system, ...
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Bitemporal hemianopsia
Bitemporal 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. It is usually associated with lesions of the optic chiasm, the area where the opt ...
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Superior hemianopia
Superior may refer to:
*Superior (hierarchy), something which is higher in a hierarchical structure of any kind
Places
* Superior (proposed U.S. state), an unsuccessful proposal for the Upper Peninsula of Michigan to form a separate state
*Lak ...
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Inferior hemianopia
Inferior may refer to:
* Inferiority complex
* An anatomical term of location
* Inferior angle of the scapula, in the human skeleton
* ''Inferior'' (book), by Angela Saini
* '' The Inferior'', a 2007 novel by Peadar Ó Guilín
See also
*Junior ...
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Quadrantanopia
Quadrantanopia, quadrantanopsia, refers to an anopia (loss of vision) affecting a quarter of the visual field.
It can be associated with a lesion of an optic radiation. While quadrantanopia can be caused by lesions in the temporal and parieta ...
References
External links
Visual disturbances and blindness
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