Migraines: Migraine auras can be associated with flashing lights, and both vitreous and retinal detachments can be associated with light flashes. Even rubbing your eyes can cause transient light flashes. But repetitive spontaneous flashes need evaluation.
Answered 11/2/2012
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See below: Floaters, flashing lights, or part of the peripheral vision missing (like a curtain or veil obscuring your vision) indicates the need for an urgent dilated retinal examination to rule out retinal tear or detachment. It could also be an ocular migraine.
Answered 12/9/2013
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