“Lazy eye” affects about four million people in the United States. It occurs when, for one of several reasons, one eye is used less than the other. If one eye is crossed or turns out, the individual sees double, so he or she learns to “shut off” or ignore that eye. If the two eyes are very different, one nearsighted and the other farsighted, the same thing can occur. After a while, vision in the unused eye is reduced.
For many years it was thought that amblyopia, or “lazy eye” – when one eye sees poorly and cannot be helped with corrective lenses – was a permanent condition unless it was detected and treated before the age of six. Many optometrists no longer accept this, believing that even adults can improve their sight - if not completely correct their lazy eye – through special therapy.
The American Optometric Association agrees that current research proves the old theory wrong. The success rate does drop off as one gets older, but the cut-off at age six is arbitrary. Age should not be a barrier, though the longer the condition has existed the more difficult it becomes to treat.