Clinical Features and Surgical Outcome of Triad Exotropia

A prevalence of A-pattern strabismus with exotropia is reported in 9% to 27% of exotropia cases.1 –4 Dysfunction of the superior oblique muscle is suggested as the principal cause of horizontal strabismus with A-pattern.3 Superior oblique overaction is an exaggeration of the normal function of the superior oblique muscle that includes intorsion, depression, and abduction. Dissociated vertical deviation is the tendency for an eye to elevate, abduct, and extort when binocularity is suspended by occlusion or the patient spontaneously dissociates. However, causes of dissociated vertical deviation
Source: Journal of Pediatric Ophthalmology and Strabismus - Category: Opthalmology Authors: Source Type: research