Cook Vision Therapy in Atlanta, GA

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Crossed Eyes (Strabismus)
Lazy Eye (Amblyopia)
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Simple Exercises


An eye with "Amblyopia" is one that is otherwise healthy but has reduced vision that glasses do not correct. Even with the best glasses in place, the eye remains partially blind, sometimes legally blind. Amblyopia is also called "Lazy Eye."

What causes Lazy Eye?
There are two main causes of lazy eye.

  1. Certain types of strabismus can cause lazy eye. If strabismus is "constant" meaning that it is always present, and "unilateral" meaning that the same eye is turned in, the unused eye will become lazy.
  2. If one eye needs glasses and the other eye is normal, the child will use only the normal eye. The other eye will not develop its proper connections with the brain and its vision will be lost. When the correct glasses are prescribed, the vision in the poor eye does not improve because that eye hasn't "learned to see. Only when active treatment has restored the proper connections in the brain will the vision in the abnormal eye be restored.
Why Treat a Lazy Eye?
In children, Lazy Eye requires immediate treatment to prevent further loss of vision. Such care helps ensure that if something happens to a person's good eye that person will not be left partially blind. An equally important reason to treat a lazy eye, though, is safety. A person with Lazy Eye may misjudge how far away things are or fail to see things approaching from the side. A long-term Scandinavian study found that children with lazy eye were over fifteen times more likely to suffer accidents to their normal eyes.

Can a Lazy Eye be Treated After the age of Six?
Yes. The former belief that you can't treat a lazy eye after some set age, such as six or nine, is false. In 1977, three faculty members of the State University of New York, Birnbaum, Koslowe, and Sanet, reviewed the scientific literature about Lazy Eye and found little difference in the amount of improvement between persons treated before age seven or after age sixteen. At Cook Vision Therapy Center we have been helping even adults for the past two decades.

Will a Patch Need To Be Worn?
Studies have shown that extensive patching is not required so long as exercises that provide intensive stimulation of the lazy eye are performed for short periods each day. More importantly, the doctor will also assign exercises that ensure the lazy eye works, not only when the good eye is patched, but when both eyes are open. Performance of the two eyes will then be integrated with the six other abilities listed on the "7 Visual Abilities" web page. In this manner depth perception will further increase and gains in the lazy eye's vision have the best chance to remain after treatment is finished. The goal is to achieve the best possible two-eyed seeing for safety and performance during sports, driving and study.
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©2004-2015 David L. Cook, FCOVD, Cook Vision Therapy Center, Marietta, GA