Eye Deceases

(H50.1, H50.3) Exotropia

Exotropia Introduction

Exotropia means “to depart” or "move out of". It is a type of strabismus where the eyes move away outward. It stands as the opposite meaning of esotropia. There is a lesser instance of Exotropia being found in the ocular motility examination, in comparison to esotropia. Varied causes such as chronic retinal detachment or optic neuropathy tend to be among patients with poor vision. Most of the determined cases in the examination turn out to be either intermittent exotropia or consecutive exotropia. To go into the details of the same briefly, constant exotropia is best visible when the eye turns outward at all distances and at all times. In the latter case, when the eye turns outward occasionally, it is called intermittent exotropia or alternating exotropia.

ICD-10 H50.1, H50.3
ICD-9 378.1

What Causes Exotropia?

The origin of exotropia is not fully comprehensible. However, the given medical evidence suggests that the age of onset tends to vary and is often between 6 months and 4 years. One study has detected that children with exotropia are more prone to develop a psychiatric disorder in comparison with the general population. A variety of diseases like diabetes, myasthenia gravis, multiple sclerosis, brainstem aneurysms, stroke, circulation problems, and thyroid can lead to exotropia in adults.

Chiefly, the emergence of Exotropia takes place from:

  • Nerve problems
  • Deformities
  • Eye-related injuries
  • Head-related wounds

Symptoms of Exotropia

The first signs of Exotropia can be seen when both the eyes are not positioned in the same direction.

The common symptoms include in Exotropia:

  • Decreased vision
  • Restrained vision of one’s image
  • Light-sensitivity
  • Frequent rubbing of the eyes

Treatment of Exotropia

Depending on the severity of the problem, the doctor may suggest the patient to undergo either surgery or wear the glasses. On the flip side of surgery, surgical intervention may disturb the normal functioning of the brain and may result in losing vision once for all. Vision therapy gives better results than the surgery. Besides, eye exercises help to further the eye muscle function of a patient.

Types of Exotropia

  • Type I: Exophoria at distance and Orthophoria at near
  • Type II: Intermittent Exotropia at distance, Orthophoria or Intermittent Exotropia at near
  • Type III: Exotropia at distance, exophoria or intermittent exotropia at near
  • Type IV: Exotropia at distance and near