I am 15 years old .. i have really bad dizziness.. i used to be on the computer for all hours of the day, starting from the time i woke up to the time i went to sleep. Recently I have changed my patterns, I am barely on the computer now, but I noticed that I always have headaches, neck aches, back aches, dizziness when shifting my eyes, blurred vision, i noticed that i squint a lot also because my eyes feel irritated. i got an eye test done which came out perfectly good except he told me that my eyes are having trouble focusing.. what could this be?