Primary open angle glaucoma (POAG) is an eye condition caused by a reduced drainage in the eye canals due to blocked canals. This results in increased eye pressure which causes damage to the optic nerve. This condition is one of the leading causes of irreversible blindness.

Although a definitive link has not been identified between primary open angle glaucoma and migraine, a meta-analysis concluded “subjects who suffered from migraine had a 24% higher risk of developing POAG when compared to those who had never suffered from migraine.”1