Hi, I find that my prescription glasses and sunglasses contribute to my chronic daily headache, which I have had since the onset of my dysautonomia about 2 1/2 years ago. I prefer to wear nonprescription sunglasses (helps with light sensitivity). I always thought the prescription glasses headache worsening was unrelated to my dysautonomia, but after talking with another POTSie who also finds corrective lens make her head hurt more, I wonder if this is related to a dysfunctional autonomic nervous system, and how? Have any of you experienced this too? By the way, my prescription was checked and I got new glasses very recently at the Mayo Clinic, and the headache worsening with glasses still persisted.