CONVERGENCE INSUFFICIENCY

"Convergence" is the act of aiming the eyes at nearer distances. If a person crosses his eyes to look at his nose, his eyes are fully "converged." To look far away that person has to diverge his eyes. To read, he has to partially "converge" his eyes for long periods.

"Convergence insufficiency" is the condition in which a person has difficulty comfortably and efficiently converging eyes at reading distance and closer for extended periods of time.

In such cases, the eyes "look" normal, but the effort to see within arm's reach is so great that it can cause discomfort, headaches, drowsiness, or lack of comprehension during reading and computer work. To learn more about this type of problem see "Eye-Muscle Coordination" on the "7 Visual Abilities" web page. Also see "Reading Problems and Dyslexia" on the "Vision and Learning" web page. In addition, convergence insufficiency can also cause almost any of the symptoms listed in the "Adult Self Assessment" and "Children's Screening" web pages.

Treatment
At Cook Vision Therapy Center, we use the latest technologies to treat Convergence Insufficiency including the use of a number of different instruments, lenses, and activities to teach the patent how to converge comfortably and efficiently and without the slightest effort. Even more importantly, we integrate this new seeing with the six other "Visual Abilities" described on the "7 Visual Abilities" web page. By using a wide range of activities and "over-training" the condition, comfortable seeing becomes so second nature that not only is reading, learning, and computer work made easier but the results hold after treatment is completed.

Convergence Insufficiency and Reading Disability

In 1993, D. Atzmon, a M.D., published a controlled medical study which showed the efficacy of vision therapy for reading difficulties associated convergence insufficiency. About the study, Firmon E. Hardenbergh, M.D., Chief of Ophthalmology and Ophthalmologist to the Harvard University Health services wrote:

"In my opinion, the prospective study was well planned and is essentially double blinded. . . The results support the proposition that application of orthoptics [a form of vision therapy] to all learning/reading disabled or deficient children who manifest convergence insufficiency should be the first line of therapy . . ."

See the "Scientific Support" web page for an exact reference.