How is homonymous hemianopsia diagnosed?

A thorough evaluation of the visual system is needed for an accurate diagnosis. A visual field exam is one in which the patient focuses on a target in front while noting lights flashed above, below, left, and right of the target. This is the most common test that is used.

Magnetic resonance imaging (MRI) of the brain is used to diagnose the underlying location and cause of the brain injury.
