At Luke's 4 year check-up (we went really late), the nurse did a vision screening. Luke did fine when he could use both eyes, but when he had to cover one eye to do the test he had some trouble. So the doctor recommended that we see a pediatric opthamologist/ optometrist. We had to wait about 4 months before we got an appointment with the doctor our pediatrician recommended. Luckily Luke's teacher's daughter saw the same doctor for some significant eye problems, so she was able to tell me exactly what to expect. I prepped Luke well with the information his teacher gave me, and Luke did great during the appointment. I was expecting the doctor to say that nothing was wrong, but instead she said that Luke is very farsighted and is crossing his eyes to see things up close. And he needed glasses.
Luke was adamant that he wanted GREEN glasses. We went to several stores looking for a pair of green glasses that Luke would wear (his sensory issues are even more sensitive by his face), and it turned out that the doctor's office optical store has a monopoly on green glasses for boys. So after a few days of running around checking optical selections we went back to the doctor's office to order the ones that he really wanted.
I think he made a pretty good choice: