Strabismus

(Tropia; Crossed Eyes)

Definition

Strabismus is a problem with the alignment of the eyes. One or both of the eyes are turned in, out, up, or down.
Appearance of Strabismus
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There are two types:
  • Constant strabismus—the eye turns all the time
  • Intermittent strabismus—the eye turns only some of the time, like in times of stress, illness, concentration, or when tired

Causes

Strabismus is caused by a lack of coordination between the muscles in the eyes. This can happen due to:
  • Problems, imbalances, or injuries of the muscles that move the eyes
  • Nervous system disorders that affect vision, such as:
    • Problems or injury of the nerves that control the eye muscles
    • Tumor in or near the eye or brain
    • Strokes or bleeding in the brain
    • Increased pressure in the brain
    • Myasthenia gravis

Risk Factors

Strabismus is most common in children but may occur in adults. Factors that increase your risk for strabismus include having:

Symptoms

Symptoms may include:
  • Double vision
  • Crossed eyes
  • Eyes that do not align properly
  • Uncoordinated eye movements
  • Squinting
  • Favoring a certain head position

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