Approximately 15 percent are born with nothing wrong with the refractive parts of the eye -- the cornea and crystalline lens which bend light and focus it properly on the retina. Farsightedness usually decreases as a child ages, typically normalizing to a negligible value by the age of 7-8.
After a child grows and the incidence of farsightedness decreases, that of nearsightedness increases. Many school-age children and teens first discover they are nearsighted when they have difficulty reading the writing on the board at school. Nearsightedness usually occurs before age 25.
Vision skills for school
Your school-age child's eyes are constantly in use in the classroom and at play. When his or her vision is not functioning properly, learning and participation in recreational activities can suffer.
Good vision involves many different skills working together to enable your child not only to see clearly but also to understand what he or she sees.
Those skills include:
- Near Vision
Ability to see clearly and comfortably at 13-16 inches, the distance at which school deskwork should be performed.
- Distance Vision
Ability to see clearly and comfortably at 10 feet or more.
- Binocular Coordination
Ability to use the two eyes together.
- Eye Movement Skills
Ability to aim the eyes accurately, and move them smoothly across a page and quickly and accurately from one object to another.