I have no idea if needing eyeglasses can cause a headache. I’ve been experiencing headaches on and off for a week or so now. I think I need to wear eyeglasses especially I can’t see small words when I read or write most of the time. Sometimes I experience watery eyes from my headache. Now, my family thinks that my headaches are from needing a pair of eyeglasses. Probably soon I’ll need to go to an eye doctor to get a prescription for eyeglasses.