Status of Binocular Single Vision in Children with Intermittent Exotropia.

Abstract

OBJECTIVE. To study the status of binocular single vision in children with intermittent exotropia. On the basis of these observations, to contribute regarding timing and type of management of intermittent exotropia. MATERIALS AND METHODS. The study was a conducted in the Orthoptic section of the Paediatric Ophthalmology Department of College of Ophthalmology and Allied Vision Sciences/KEMU/Mayo Hospital Lahore.Its duration was one year. Detailed history and examination and orthoptic assessment of 30 children with intermittent exotropia was done. Binocular single vision was checked with Titmus Stereoacuity TEST, Fly test, Animal test, Lang test and Frisby Test. RESULTS. Out of total 30 children, 13 were male and 17 were female. Minimum age was 4 years. 22 children were between 4 to 11 years, 5 between 12 to 15 years and 3 above 15 but less than 18 years.14 children had poor near stereo acuity while 11 children had very good stereopsis for near. CONCLUSION. In this study 46.7% (n=14) had poor near stereopsis. On the basis of finding of this study it would be difficult to predict any improvement in binocular single vision after surgical or nonsurgical management of intermittent exotropia. KEY WORDS. Strabismus, Intermittent Exotropia, Binocular Single Vision, Stereopsis.