Quadrantanopia
Quadrantanopia
Quadrantanopia (pronounced kwɒdræntəˈnoʊpiə) is a type of visual field defect that results in the loss of vision in a quarter section of the visual field. It is often caused by stroke, brain tumor, or other neurological disorders.
Etymology
The term "quadrantanopia" is derived from the Latin quadrans meaning "quarter" and the Greek anopia meaning "blindness".
Types
There are two main types of quadrantanopia:
- Homonymous quadrantanopia: This is when the same quarter of the visual field is lost in both eyes. It can be further divided into superior and inferior types, depending on which quarter of the visual field is affected.
- Bitemporal quadrantanopia: This is when the outer (temporal) quarter of the visual field is lost in both eyes.
Diagnosis
Diagnosis of quadrantanopia is typically made through a visual field test, which can identify the specific area of vision loss. Other diagnostic tools may include MRI or CT scan to identify any underlying neurological conditions causing the vision loss.
Treatment
Treatment for quadrantanopia is primarily focused on addressing the underlying cause of the vision loss. This may include medication, surgery, or other treatments for the neurological condition causing the vision loss. In some cases, vision therapy may also be used to help improve visual function.
Related Terms
- Hemianopia: This is a type of visual field defect that results in the loss of vision in half of the visual field.
- Scotoma: This is a type of visual field defect that results in a blind spot in the visual field.
External links
- Medical encyclopedia article on Quadrantanopia
- Wikipedia's article - Quadrantanopia
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