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Related Experiment Video

Updated: Feb 2, 2026

A Murine Model of Ischemic Retinal Injury Induced by Transient Bilateral Common Carotid Artery Occlusion
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Central retinal artery occlusion.

Sohan Singh Hayreh1

  • 1Department of Ophthalmology and Visual Sciences, College of Medicine, University of Iowa, Iowa City, Iowa, USA.

Indian Journal of Ophthalmology
|November 20, 2018
PubMed
Summary

Central retinal artery occlusion (CRAO) has four types, with spontaneous visual improvement occurring within 7 days, especially in transient forms. Intra-arterial thrombolysis is not recommended for CRAO.

Keywords:
Central retinal artery occlusionretinal arteriesretinal artery occlusionretinal vessels

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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.