It occurs when the eyes, for some reason, have not learned to work together. There are two types. One is caused by toxic substances such as alcohol or tobacco. The second type is caused by lack of use.
Amblyopia can effect almost everyone, but it is most prevalent among children and infants.
The majority of cases are caused by lack of use and are found in children. Children do not outgrow it and early detection is the best way of avoiding additional complications. Usually aging is not a factor unless it is accompanied by a corresponding increase in the use of toxic substances such as alcohol or tobacco. Individuals with a family history of strabismus or amblyopia are more likely to suffer this condition. Amblyopia is a relatively common condition, affecting approximately 4 out of every 100 people.