be sure you see an ophthalmologist for a full eye exam to be sure no other problem; and that your glasses are okay. Because the pupil does not constrict it lets in more light to wearing a brimmed hat, sunglasses and having a tint or glasses that darken in light are often helpful.
JCH MD
I have been diagnosed with Adies Pupil & have experienced constant headaches. Before having this condition, I hardly ever had headaches, my vision is fine, but my eyes are extremely sensitive to light and at night the car lights bother me. Although, the condition isnt life threatening; it's definitely annoying.
No Adies pupil does not cause headache. Since things have changed you should see an Eye MD ideally a neuroophthalmologist. This is very important as some serious problems might cause this, it could be a less serious migraine variant.
Find an Eye MD near you at www.aao.org
JCH MD