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What causes retinal-vein occlusion (RVO)?

A retinal-vein occlusion (RVO) occurs when a vein in the eye's retina is blocked. There are two main types of retinal-vein occlusion: Central retinal-vein occlusion (CRVO), when the main vein of the eye (located at the optic nerve) becomes blocked; and branch retinal-vein occlusion (BRVO), when one of the smaller branches of vessels attached to the main vein becomes blocked.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.