At this stage, most children have passed that crucial time during infancy where many childhood visual problems develop. Parents need to look for refractive errors in their preschoolers by watching for these warning signs:

•   Consistently sitting too close to the TV or holding a book too   close
•   Squinting
•   Tilting the head to see better
•   Frequent eye rubbing when your child is not sleepy
•   Sensitivity to light
•   Excessive tearing
•   Closing one eye to read, watch TV or see better
•   Avoiding activities which require near vision, such as coloring or   reading, or distance vision, such as playing ball or tag
•   Complaining of headaches or tired eyes