Lens tinting for headache

reduction of photophobia and headache in people with migraine headaches

fMRI studies show decreased light-evoked activation in areas associated with pain processing (somatosensory cortex, insula and anterior cingulate cortex)

Benefit seen in a randomized controlled trial- reduction in headache pain

Green light is most tolerable

620 nm filters help in some (orange-red)

Blue, amber, red and white light are more likely to exacerbate headaches