Facts About Amblyopia This information was developed by the
National Eye Institute to help patients and their families
search for general information about amblyopia. An eye care
professional who examined the patientís eyes and is familiar
with his or her medical history is the best person to answer
specific questions. Table of Content What is amblyopia? The
brain and the eye work together to produce vision. Light enters
the eye and is changed into nerve signals that travel along the
optic nerve to the brain. Amblyopia is the medical term used
when the vision in one of the eyes is reduced because the eye
and the brain are not working together properly. The eye itself
looks normal, but it is not being used normally because the
brain is favoring the other eye. This condition is also
sometimes called lazy eye. How common is amblyopia? Amblyopia is
the most common cause of visual impairment in childhood. The
condition affects approximately 2 to 3 out of every 100
children. Unless it is successfully treated in ear