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What are the symptoms of ION?

Before ION occurs, many people experience transient ischemic attacks (tia) — a temporary reduction of blood flow to the optic nerve. During the attack, vision becomes dark for a few seconds or minutes and then returns to normal. You should see your ophthalmologist (Eye M.D.) or primary care physician immediately if you experience such episodes. TIAs are warning signs that a complete blockage of blood flow to the eye may occur.
An ophthalmologist may be able to detect warning signs of ION during an eye examination. The examination may involve dilating (temporarily widening) the pupil with eyedrops in order to check for swelling of the optic nerve or inflammation of arteries in the eye. Tests for intraocular pressure and glaucoma may be performed, as well as tests of your side vision.

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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.