Eye Stroke Symptoms
An eye stroke causes sudden, painless loss of vision in one eye that occurs over seconds, typically resulting in severe visual impairment (counting fingers or worse in over 80% of cases). 1
Primary Clinical Presentation
The hallmark symptom of an eye stroke (central retinal artery occlusion or CRAO) is:
- Sudden, painless monocular vision loss occurring over a period of seconds 2
- Loss of both central visual acuity AND peripheral vision in the affected eye 1
- Vision typically reduced to 20/200 to counting-fingers range, though can occasionally be as good as 20/20 if a cilioretinal artery is present (occurs in 15-25% of cases) 2
Additional Symptoms and Signs
Visual symptoms:
- Impaired color vision proportional to the degree of visual acuity loss 1
- In ophthalmic artery occlusion (more proximal blockage), vision is usually hand motions or worse due to more extensive ischemia 2
What patients typically do NOT experience:
Important Clinical Context
Bilateral involvement is rare (only 1-2% of cases), so symptoms are almost always limited to one eye 2.
Time course matters: The visual loss is abrupt and maximal at onset, not gradual. Some patients may have had preceding episodes of transient monocular vision loss (amaurosis fugax) as a warning sign, though this is not always present.
Critical Pitfall to Recognize
In patients over 50 years old presenting with these symptoms, giant cell arteritis must be considered urgently 2. Additional symptoms suggesting arteritis include:
- Temporal headache or tenderness
- Jaw claudication
- Weight loss
- Proximal muscle pain (polymyalgia rheumatica)
- Fever
This distinction is critical because arteritic CRAO requires immediate high-dose corticosteroids to prevent vision loss in the fellow eye 2.
Associated Stroke Risk
Patients with eye stroke symptoms have significantly elevated risk of concurrent or subsequent cerebral stroke (20-24% have concurrent stroke, 3-6% develop stroke within 1-4 weeks) 2, making these symptoms a medical emergency requiring immediate stroke center evaluation 1, 2.