Take him in. My DD has a wandering eye, but it wanders "out" and when things are far away. Ive had her to the optometrist (sp!) 3x, and we go every 3 months, they are "keeping an eye on it", for now. They told me that if the eye turns in, its of more concern, than turning out. Its normal or common enough for eyes to wander, but if it doesnt correct itself while they are young, the brain is trained to listen to the stronger eye, as opposed to both. Then, if that happens, while they can tighten the muscle to bring the wanderer in with the other, that eyes signal doesnt register in the brain. Both Dh and I have a wandering eye, as do our fathers. Dh had his surgically "fixed" as a child, I did exercises (that are no longer popular.) I needed a referral from the family doc. So maybe start with the pediatrician. Google wandering eyes a bit for more info, some dr's seem to be unconcerned about it, but it should really be dealt with.