Bitemporal hemianopsia
Bitemporal hemianopsia (pronounced: bi-temp-o-ral hemi-an-op-sia) is a medical condition characterized by the loss of vision in the outer (temporal) half of the visual field in both eyes. This condition is often associated with lesions or disorders that affect the optic chiasm, the part of the brain where the optic nerves partially cross.
Etymology
The term "bitemporal hemianopsia" is derived from three Greek words: "bi" meaning two, "temporal" referring to the sides of the visual field, "hemi" meaning half, and "anopsia" meaning blindness.
Symptoms
The primary symptom of bitemporal hemianopsia is the loss of peripheral vision. This can make it difficult for individuals to navigate their environment and may lead to difficulties with tasks such as reading or driving.
Causes
Bitemporal hemianopsia is most commonly caused by a lesion or tumor in the pituitary gland, which is located near the optic chiasm. Other potential causes include stroke, traumatic brain injury, and certain types of brain surgery.
Diagnosis
Diagnosis of bitemporal hemianopsia typically involves a visual field test, which can identify the specific areas of vision loss. Further testing, such as MRI or CT scan, may be used to identify the underlying cause of the condition.
Treatment
Treatment for bitemporal hemianopsia depends on the underlying cause. If a tumor is present, treatment may involve surgery, radiation therapy, or medication. In some cases, vision may partially or fully return after treatment.
Related Terms
External links
- Medical encyclopedia article on Bitemporal hemianopsia
- Wikipedia's article - Bitemporal hemianopsia
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