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Amblyopia

Amblyopia ("lazy eye") is a condition in which the neuronal connections for one eye (or sometimes both) improperly develop during childhood, thus causing reduced vision and binocularity.

 

During normal visual development, each eye receives the same clear image. The brain then combines each image into a single perception ("binocular fusion") in order to see objects with clarity and depth. In amblyopia, however, the ability to focus both eyes equally is disrupted during early childhood development. This causes the brain to favor one eye over the other 

Signs and Symptoms

These symptoms are generally related to the use of the eyes for reading or other close work:

  • Blurred vision

  • Double vision

  • Eyestrain

  • Headaches

  • Reading problems

  • Sleepiness

  • Difficulty concentrating on reading or other near work

  • Loss of comprehension over time

  • A pulling sensation around the eyes

  • Movement of the print

Treatment

Vision therapy is the treatment of choice for convergence insufficiency. A therapy program should emphasize the ability to converge the eyes with accuracy and stamina, as well as its integration with accommodative ("eye focusing") and oculomotor ("eye tracking") skills. In some cases, prism glasses (i.e. special lenses that assist with eye alignment) may provide immediate relief of symptoms. 

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