Abstract
Intermittent distance exotropia is a deviation characterized by an exophoria at near fixation and manifest exotropia at distance fixation. There is normal binocular fusional vergence and stereoacuity at near fixation, but the eyes tend to diverge in bright sunlight, tiredness, day dreaming and the patient may close one eye in such circumstances. Prematurity is associated with numerous eye pathology, besides retinopathy of prematurity, amblyopia, refractive errors, it is also associated with a higher risk esotropia and exotropia. We report a case of a 5-year-old girl (preterm and very low birth weight) with an intermittent deviation of both eyes since three years. On her detailed ocular examination diagnosis of divergence excess intermittent exotropia with normal accommodative convergence to accommodation ratio was made. Bilateral lateral rectus recession was done using hang back technique. Postoperatively, the eyes were aligned normally thereby achieving orthotropia. This article reviews various neurophysiological aspects of intermittent divergent squint delineating the etiopathogenesis, classification system, and management options in intermittent exotropia.
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