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It started today, do you feel that your vision has changed otherwise? Weaker?
Generally flashes of lights are due to what we call visual migraines.
They are normal and aren't anything of concern.
However, if they don't resolve within 1-2 days then we recommend an eye exam to be sure nothing else is going on such as a retinal or vitreous detachment.
You did the right thing to ask about it.
At this time I'm not worried and suspect it will resolve just fine on its own.
Let me know if anything changes in the next couple of days please.
Likewise, happy TG.