Amblyopia, sometimes called "lazy eye," is defective vision or blindness in an eye. Amblyopia happens when the eyes do not work together to develop the normal vision that fuses the image from each eye into one single image for the brain.
Strabismus means an abnormal coordination of eye movements and is very often the cause of amblyopia. In strabismus, eyes may turn in, out, up, or down; together or separately; constantly or occasionally.
