Which statement describes homonymous hemianopsia?

Which statement describes homonymous hemianopsia?

• A. Loss of half of the visual field in the same side in both eyes
• B. Loss of all vision in one eye
• C. Double vision with eye movement
• D. Inability to perceive colors

Answer: (A)

Homonymous hemianopsia happens when a lesion after the optic chiasm—such as in the optic tract, optic radiations, or occipital cortex—causes the same half of the visual field to be lost in both eyes. The deficit is on the opposite side of the brain lesion, so you’d see the right visual field missing in both eyes if the left posterior brain pathway is damaged, or the left field missing if the right pathway is damaged. The statement describing loss of half of the visual field on the same side in both eyes captures this pattern exactly. This differs from losing vision in just one eye (optic nerve problem), double vision with eye movement (diplopia from extraocular muscle or nerve issues), or color vision problems (color vision deficiency).

Homonymous hemianopsia happens when a lesion after the optic chiasm—such as in the optic tract, optic radiations, or occipital cortex—causes the same half of the visual field to be lost in both eyes. The deficit is on the opposite side of the brain lesion, so you’d see the right visual field missing in both eyes if the left posterior brain pathway is damaged, or the left field missing if the right pathway is damaged. The statement describing loss of half of the visual field on the same side in both eyes captures this pattern exactly. This differs from losing vision in just one eye (optic nerve problem), double vision with eye movement (diplopia from extraocular muscle or nerve issues), or color vision problems (color vision deficiency).