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Is intermittent exotropia a curable condition?

J M Holmes1, S R Hatt1, D A Leske1

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Summary
This summary is machine-generated.

Surgical treatment for childhood intermittent exotropia (XT) shows limited long-term cure rates. Some cases of intermittent XT may resolve spontaneously without surgery, suggesting a need for further study.

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Area of Science:

  • Ophthalmology
  • Pediatric Medicine
  • Strabismus Research

Background:

  • Childhood intermittent exotropia (XT) often has high recurrence rates after surgical intervention.
  • The natural history and spontaneous resolution rates of intermittent XT are not well-established.
  • Anecdotal evidence suggests some cases of intermittent XT may resolve without surgical management.

Purpose of the Study:

  • To compare long-term cure rates in children with intermittent exotropia managed surgically versus non-surgically.
  • To evaluate the efficacy of surgical intervention versus observation for achieving a cure in childhood intermittent XT.
  • To investigate the spontaneous resolution potential of intermittent XT in a pediatric population.

Main Methods:

  • Retrospective identification of children with intermittent XT who underwent surgery and had a minimum of 5 years of follow-up.
  • Selection of a comparable non-surgical cohort matched for age at onset and age at the 5-year examination.
  • Definition of cure as absence of manifest tropia, new monofixation, and need for additional surgery.

Main Results:

  • The 5-year cure rate was 30% in the surgical group and 12% in the non-surgical group (P=0.1).
  • No significant differences were found between groups regarding age at onset, presentation, or initial deviation angle.
  • A small proportion of patients in both groups achieved the defined cure after an average of 7 years follow-up.

Conclusions:

  • Long-term cure for childhood intermittent exotropia is challenging to achieve, even with surgical intervention.
  • Surgical treatment for intermittent XT does not guarantee a definitive long-term cure.
  • Spontaneous resolution of intermittent XT can occur in some children managed without surgery.