What are squiggly lines in my vision from time to time what isit?

? Optic migraine: You may have this symptom with or without a headache, among other possibilities. Please see your doctor for accurate disgnosis.

Depends: If it is intermittent and moves, then it's likely a floater in the vitreous. If it doesn't move and is constant or increasing, then can be a problem in the retina. Sometimes a moving line of light can be representative of a cortical problem like an optic migraine.