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A classic migraine typically commences with
an "aura", which is involved with changes in the way a
person see. An aura typically lasts 10-30 minutes, during which time one might see colors and flashing lights, and
sometimes a temporary loss of vision.
There is some evidence that the temporary visual disturbances of ocular migraines can become permanent. For this reason, they shouldn't be dismissed as less serious because they occur without pain. A helpful first step is a visit to the ophthalmologist, who can rule out any disorders of the delicate and irreplaceable retina at the back of the eye.
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