Quadrantanopia

Quadrantanopia is a type of visual field loss that occurs in one quarter of the visual field. It is often caused by brain damage, specifically to the retina or optic nerve. Quadrantanopia can be classified as either homonymous quadrantanopia or heteronymous quadrantanopia, depending on whether the visual field loss is on the same side or different sides in both eyes.

Causes

Quadrantanopia is typically caused by damage to the visual pathway, which includes the retina, optic nerve, optic chiasm, optic tract, lateral geniculate nucleus, optic radiation, and visual cortex. The specific location of the damage determines the type and location of the quadrantanopia. For example, damage to the optic radiation in the temporal lobe results in superior quadrantanopia, while damage in the parietal lobe results in inferior quadrantanopia.

Diagnosis

Diagnosis of quadrantanopia is usually made through a visual field test, which can identify areas of visual field loss. Other tests may include MRI or CT scan to identify any damage to the brain or visual pathway.

Treatment

Treatment for quadrantanopia is usually aimed at addressing the underlying cause of the condition. This may include surgery, medication, or rehabilitation therapy to help improve visual function.

See also

• Hemianopsia
• Scotoma
• Blind spot

Quadrantanopia Resources
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