Clinical Report: Retinal Ischemia as Stroke Warning

Overview

Revise to ensure clarity on the percentage of patients experiencing strokes or TIAs within a year, aligning with data highlights.

Background

Acute ischemic ocular events, such as retinal artery occlusion and amaurosis fugax, are not only ophthalmic emergencies but also critical warning signs of potential strokes. Understanding the relationship between these ocular events and cerebrovascular risks is essential for timely intervention and prevention of further complications. This study provides comprehensive data on the incidence and timing of strokes following IOEs, highlighting the need for integrated care between ophthalmology and stroke services.

Data Highlights

Key Findings

• 22.8% of patients experienced either an ischemic stroke or transient ischemic attack within one year of an ocular ischemic event.
• Carotid artery stenosis increases the likelihood of stroke or TIA by 60-75%.
• Hypertension was present in over 75% of affected patients, indicating a significant modifiable risk factor.
• Age is a non-modifiable risk factor, with an 11% increase in risk for each decade of life.
• Nearly 10% of patients had a cerebrovascular event on the same day as their ocular presentation.

Clinical Implications

The detection of an IOE should prompt immediate referral for stroke evaluation, as the risk of cerebrovascular events is significant and time-sensitive. Clinicians should implement structured follow-up and comprehensive vascular assessments to mitigate risks, even in patients perceived as low risk.

Conclusion

IOEs serve as critical systemic warning signs that necessitate urgent evaluation and coordinated care between ophthalmology and stroke services. The findings underscore the importance of recognizing the broader implications of ocular ischemic events.

References

1. Retinal Physician, Remote OCT Protocol to Speed Diagnosis and Treatment of CRAO, 2025 -- Remote OCT Protocol to Speed Diagnosis and Treatment of CRAO
2. Optometric Management, It's About Time: Follow the Guidelines for Stroke in the Eye, 2025 -- It's About Time: Follow the Guidelines for Stroke in the Eye
3. Frontiers in Neurology, Retinal Layer Reflectivity and Thickness as OCT Biomarkers for Diagnosis and Imaging-Based Stratification Relative to the 4.5-Hour Window in Acute Central Retinal Artery Occlusion, 2026 -- Retinal Layer Reflectivity and Thickness as OCT Biomarkers for Diagnosis and Imaging-Based Stratification
4. Retinal Physician, CONTROVERSIES IN CARE: Workup of Acute Retinal Artery Occlusion, 2022 -- CONTROVERSIES IN CARE: Workup of Acute Retinal Artery Occlusion
5. AAO, AAO Retinal and Ophthalmic Artery Occlusions Guideline Summary -- AAO Retinal and Ophthalmic Artery Occlusions Guideline Summary
6. Intravenous alteplase versus oral aspirin for acute central retinal artery occlusion within 4·5 h of severe vision loss (THEIA)
7. Risks of stroke and myocardial infarction after retinal artery occlusion and their time dependence: a systematic review and meta-analysis
8. AAO Retinal and Ophthalmic Artery Occlusions Guideline Summary