Buying prescription glasses for kids is not a simply things, The kids glasses prescription must be accurate, including astigmatism axis, the horizontal axis, pupillary distance, all should be accurate and adjust well, then let your child to wear glasses for 15 minutes to see if there are headaches, dizziness or other abnormal sensory and visual material being seen tilted, if your child feel uncomfortable while wearing eyeglasses, the glasses should be adjusted again. » Read more: What you should know on kids prescription glasses!