It's important generally to maintain checks on our children as they go about their studies. Make sure they are eating for healthy vision, taking supplements, looking away from their computer screens or books every 20 minutes or so. The last thing you want are strained eyes that would further impact effective study sessions. The number of children having myopia is increasing way to fast, it's getting quite worrying! Be responsible teachers and parents. Grades are one thing but health is necessary for our children to function at their optimum! Cheers!