Israeli researchers have completed the largest study of its kind on attention deficit disorders and eye problems. Fifty-three children with attention disorders were tested, and 83% were found to have vision problems, in a study published in the European Journal of Ophthalmology.

Forty-three percent of the children were found to be short-sighted, 20% were near-sighted, and 20% had astigmatism. Six percent had problems with depth perception, and 4% had trouble focusing their eyes at short distances.

Researchers believe the two issues are linked, but are not sure if eye problems exacerbate the problem of a short attention span, or if both are symptoms of one root issue.