Central retinal artery occlusion

Area of Science:

• Ophthalmology
• Vascular Neurology

Background:

• Central retinal artery occlusion (CRAO) is a critical condition leading to vision loss.
• Understanding the distinct clinical entities of CRAO is essential for effective management.
• Prevalent misconceptions regarding CRAO require clarification.

Purpose of the Study:

• To discuss the pathogeneses, clinical features, and management of CRAO.
• To differentiate between the four clinical entities of CRAO.
• To address misconceptions and highlight recent findings on CRAO treatment.

Main Methods:

• Review and synthesis of existing literature on CRAO.
• Analysis of clinical characteristics and visual outcomes across different CRAO subtypes.
• Evaluation of the efficacy and safety of intra-arterial thrombolytic agents.

Main Results:

• CRAO comprises four types: non-arteritic (NA-CRAO), transient NA-CRAO, NA-CRAO with cilioretinal artery sparing, and arteritic CRAO.
• Spontaneous visual improvement occurs within 7 days, with varying incidence across CRAO types (e.g., 82% in transient NA-CRAO).
• Intra-arterial thrombolysis shows no benefit and may be harmful; arteritic CRAO shows no spontaneous change.

Conclusions:

• Clinical outcomes and management strategies for CRAO are highly dependent on the specific type.
• Early spontaneous visual recovery is possible, particularly in transient NA-CRAO.
• Current evidence suggests avoiding intra-arterial thrombolysis for CRAO and focusing on etiological investigation and risk reduction.