Could you tell me what are leads to of flashes of light in vision with headaches?

? Migraine headache: This could be a headache migraine or an ocular migraine. The latter is usually not associated with pain, however. Migraine headaches can be associated with visual symptoms such as flashes, spots, formed hallucinations, etc. I'd recommend a systemic physical exam to rule out medical problems. If physically normal then have ophthalmologic evaluation to rule out ocular problems.