10 Frequently Asked Questions About Sudden Loss of Vision

9. What is ocular ischemic syndrome?

Rarely, those with severe carotid artery disease may experience a form of vision loss. Ocular ischemic syndrome affects men twice as much as it does women, primarily those over 65. The arteries are incapable of providing enough blood to the eye, and it begins to weaken. Generally, only a single eye is affected, though bilateral issues are possible. Pain is common, and though the vision loss occurs over a few weeks, it is almost always permanent. Thankfully, sudden vision loss occurs in only 12% of instances.

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