The most common reason why children come to the eye examination is refractive error (nearsightedness, farsightedness, astigmatism). Usually in young children parents notice that the child watches television from a short distance or try to squeez eyes or blink frequently while attempt to fix distant objects. Older children usually complain that they can not read properly from the blackboard.
Children, who have refractive error, sometimes complain of headaches after reading or playing computer games for a long time. The reason for that is exceptional flexibility of child eye, so child unconsciously corrects its diopter and sees well, but makes an extra effort that tires him, and in some cases this can even lead to the damage in the vision system.
Taking into consideration that child's eye is not fully developed, any refractive error has to be corrected properly and immediately. In order to correct refractive errors, children are given glasses or contact lenses.