Been getting an area of vision loss in bottom outer left eye when I stretch or sometimes bend. Had clear ophthalmic exam and in may clear headscan except 1.3cm pineal cyst. I'm 22. What could it be?

Scintillating scotom. How long does it last? Do you get a headache afterwards? Cover your eye when it happens. If it is in both eyes it is in the brain. Classic migraine is aura x15 minutes, then headache. Common migraine = headache only. Ophthalmic migraine = aura only. If both eyes, do a food diary. You may wish to avoid coffee, chocolate, red wines, aged cheeses, bananas and tree nuts.