Convergency Insufficiency

Essay by glossongCollege, UndergraduateF, November 2004

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Convergence Insufficiency

Convergence insufficiency is a syndrome of binocular vision. This occurs when

one or both eyes tend to drift slightly outward at the reading distance, and extra effort is

required to hold the eyes in alignment. This is a problem of the coordination and teaming

of the eye muscles and may contribute to symptoms of headaches and eye fatigue.

Convergence insufficiency could also lead to a slight reduction in depth perception.

Convergence insufficiency can be diagnosed through a typical eye exam. Some

people do not even know they have the disability because it could be a disability a child

is born with, but it might not show up in the child until age three. Most children start

experiencing difficulties of headaches and tired eyes, and they tell the eye doctor when

they go in for an eye exam. The diagnosis of convergence insufficiency is based on the

finding of a remote near point of convergence and decreased fusional convergence at near

fixation. In other words, a child will have problems seeing up close. According to the

American Optometric Association one or more of the following diagnostic findings

characterizes convergence insufficiency: High exophoria at near, tight accommodativeconvergence/

accommodation, and low fusional convergence ranges.

Convergence insufficiency can occur at any age but seldom becomes a clinical

problem until a patient reaches his or her teens. Characteristics of this disability consist

of eyestrain and a sensation of tension within the eyes. For a child, after brief periods of

reading, the letters in the text will blur and run together. This part of the disability on

convergence insufficiency is called crossed diplopia, which occurs during near work.

According to the article "Vision, Learning, and Dyslexia" written by Ronald Bateman,

some of the most common characteristics of convergence insufficiency is double vision,

fatigue, eyestrain,