hyperopia
Long-sightedness is caused by a short eye. Most infants are born long sighted and gradually emetropise to become normal sighted by preschool age; however, this is not always the case.
Untreated longsighted can cause visual blur particularly at near. This may result in poor attention span, difficulty at concentrating and focusing when reading. It is not uncommon to have headaches, and eyestrain. Children may often hold the near tasks very close. In longstanding uncorrected cases, Hyperopia can lead to lazy eyes including esophoria (turned in eyes). Reading spectacles often solve this problem allowing not only clearer vision but making it easier to focus.