It is a condition where the eyes cannot work together, when looking at close objects, it can cause one eye to move outwards instead of inwards along with the other eye, which creates blurry or double vision, adolescents are diagnosed and school-age children. It can cause difficulty reading, so parents or teachers may suspect that the child has a learning disability and not an eye disorder. Tiredness, pain, or discomfort in the eyes (eye strain), headaches, difficulty reading (words seem to float on the page, you get lost or read slowly), which can make you avoid reading or do not complete school assignments, double vision (diplopia), difficulty concentrating, often squinting, rubbing or closing one eye.

Treatment: the best and only option are orthoptic exercises, which are done by a specialized technician.