Out of curiosity, I looked up the symptoms.
Blurred vision, light sensitivity, poor night vision and headaches.
These are all symptoms of being nearsighted, having migraines, having eyestrain, etc. I had them all - my eye doctor said I had weak eye muscles.
All of them are incredibly generic and nonspecific. It also appears that the exam findings for the diagnosis are incredibly specific. With six eye exams, they'd have caught on by now.
I'm going through a what-if-my-doctor-is-wrong time too. They're the worst. But it's almost certainly in our heads.