My son was on acutain when he was younger.  is there anything I should be concerned about or looking for?

No. There are no long-term side effects of accutane. People who wear hard contact lenses may have trouble with them. For a few months. Otherwise he can do anything normally. The only. Post accutance restriction is that the facial skin does not heal normally for 6 months after so laser or even chemical peels are, delayed 6 months.
Dry eye. The most common problem in the eyes with accutaine is dry eye syndrome. He should be checked by an ophthalmologist if he feels as though is eyes are "tired, dry or blurry.".