MY son started doing that when he was 3 1/2 and doctors thought he was having seizers then they took that out and called it ticks he hasent dont it in a while but its been alomost a 3 years and he starts to do it again.Im scared for him he says he cant stop blicking and its scaring him but i have notice bright light and tv and video game make it worse so i have back off on that but what can u say to a 7 year old that already knows somethings wrong with him sometimes i get down cause how i see it my oldest on has the ticks and i and him worry about it and then his brother which is younger has a heart and lung proublem .So i sometime set back and wounder what have i done but i have gotten older and have thought about it that god put the with me for a reason its hard to see your kids in pain but its even harder to see u crying