Stroke and vision

How stroke affects the eyes

Stroke damages brain areas that process vision or control eye muscles. You may lose one side of your visual field, see double because the eyes no longer align, or lose vision in one eye from a retinal artery blockage linked to vascular disease. Brief one-eye vision loss (amaurosis fugax) can precede stroke even when sight returns — treat as an emergency.

Amaurosis fugax and eye stroke

Amaurosis fugax is temporary vision loss in one eye, often described as a curtain passing across sight for seconds to minutes. It warns of emboli from carotid artery disease or heart rhythm problems. Retinal artery occlusion is the eye-stroke event when vision does not return. Both need emergency stroke and eye assessment the same day.

Emergency warning signs

Think FAST and include eye symptoms:

• Face drooping on one side
• Arm weakness or numbness
• Speech slurred or hard to understand
• Time to call emergency services — sudden vision loss or double vision counts too

After acute treatment

Some visual problems improve in the first weeks; others persist. Prisms in glasses, patching for double vision, scanning training for field loss, and low-vision aids can help. Occupational therapists and stroke teams support return to reading, driving assessment and safe mobility.

Ongoing eye care

Stroke survivors still need routine eye checks for glaucoma, cataracts and other common conditions. Tell your optometrist about your stroke history and any new vision change.