in school i usall sit in the back, i have to really foucus to see the bord, and my eyes start to hurt. today the teacher put somthing on the progecter, and even tho i was sitting only 15 ft away, i still could not see it. it was blury and my eyes hurt. if i see somtheing from far away thats not words, i can see it fine. but my eyes and head constently hurt, is it becuz im straining my eyes 24/7? do i need glasses?