Homonymous hemianopia is a visual field defect involving either the two right or the two left halves of the visual fields of both eyes.

What causes homonymous hemianopia?

The most common cause of homonymous hemianopia is stroke. However, any type of damage to your optic nerves or brain can lead to hemianopia. Common causes of these types of damage include: traumatic brain injuries.

What does a person with homonymous hemianopia see?

What is homonymous hemianopsia? Homonymous hemianopsia is a condition in which a person sees only one side ― right or left ― of the visual world of each eye. The person may not be aware that the vision loss is happening in both eyes, not just one.