High, undiagnosed hyperopia (far-sightedness) can cause children to display symptoms similar to ADD/ADHD, including difficulty concentrating and problems with reading. Before any child is prescribed medication for ADD or ADHD, a thorough eye examination is vital. Vision Screenings done at the pediatricians or by a school nurse often miss hyperopia. Most children with hyperopia can see in the distance fine, but have difficulty focusing on objects close to them. It’s scary to think about how many kids are taking medications just because they’re farsighted.