Getting a proper diagnosis requires persistence

Finding the right doctor I can identify with Shannon Bream’s story in “An eyeful of agony” [June 11]. I spent most of 2010 lying on the couch with a splitting headache. I was pretty sure the root of the problem was my eyesight, but after numerous trips to the optometrist the problem wasn’t getting any better. Then I went to an ophthalmologist, who then referred me to yet another ophthalmologist specializing in strabismus (cross-eyed) issues. That doctor...