A patient with a 10-minute episode of vision loss who reports reduction in the right half of the visual field bilaterally is describing:

The situation described involves a patient experiencing vision loss specifically affecting the right half of the visual field bilaterally. This means that the loss of vision is symmetrical and occurs in the same half of the visual field for both eyes, which is characteristic of homonymous hemianopia.

Homonymous hemianopia occurs when there is damage to the visual pathways in the brain, specifically the optic tract after the optic chiasm. This condition results in the loss of the same half of the visual field in both eyes, typically due to a stroke or lesions affecting that specific area.

In contrast, hemianopia is a broader term that simply refers to loss of vision in half of the visual field but does not specify whether it is homonymous or not. Amaurosis fugax refers to transient vision loss, often described as a "shade" coming down over the eye, and usually indicates a temporary reduction in blood flow to the retina or the optic pathway. Scotoma is a localized area of visual loss surrounded by a field of vision that is relatively normal, rather than the structured loss affecting entire halves of the visual field as in this case.

Therefore, the patient's symptoms most accurately match the definition of homonymous hemianopia, as they have experienced this