TIA or strokeĪ TIA is caused by a decrease in blood flow to the brain. But you may experience some of the same visual distortions as with an aura episode caused by ocular migraine.Īlthough the terminology may seem confusing, a doctor or other healthcare professional can help you understand which condition you have. It usually involves a blind spot or complete vision loss in just one eye. It’s caused by a lack of blood flow to the eye. However, retinal migraine is a more serious condition than visual migraine. Some specialists may use the terms “visual,” “ocular,” or “ophthalmic aura” to describe retinal migraine. When you experience a visual migraine episode without a headache, it’s called an acephalgic migraine episode. You don’t necessarily get a migraine headache at the same time. The symptoms usually pass within 60 minutes. Functional magnetic resonance imaging (fMRI) can show the activation spreading over the visual cortex as the migraine episode proceeds. This happens when the nerve endings in the back portion of the brain, known as the visual cortex, become activated. The clinical term for aura associated with ocular migraine is “scintillating scotoma.” Ocular migraine episodes most often occur in both eyes. Ocular migraine may also be called visual or ophthalmic migraine. You may need to ask a doctor to clarify if you’re told you have one of these conditions. Sometimes the terms “ocular” and “retinal” are used in place of one another, but they’re different. It’s seen in about 25% of people who have migraine. The most common cause of kaleidoscope vision is migraine with aura, which can be ocular or retinal.
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