My 4 year old son roll his eyes up and tries to close one eye while watching t.v. we have minimized his screen time to 10-15 minutes a day. He is not well and having cold ,cough, fever sometimes. And eye rolling started at the same time. I tried to ask him few alphabets and numbers written in small font from distance and he was able to answer. Is it common if the kid is sick or should I check with an eye doctor.