I have a mild eye darting/rolling tic. can this damage my eyes/vision or my brain? sometimes i get a mild headache but that is it. i am a 16 y/o male

Tic disorders don't: normally cause neurological damage--they are the result of insufficient neurological inhibition. Awareness of the tic aura (sensation just prior to the urge to move) helps diminish the frequency and intensity of the movement. Meds can help but you'll need to experiment, as there is no specific medication cure. Check with your eye MD (Ophthalmologist), who may refer you to a neurologist.