Intermittent exotropia (IXT) is the most common form of childhood exotropia 2 with an incidence of 32.1 per 100,000 in children under 19 years of age. The strabismus is characterized by an exodeviation of one eye that is interspersed with periods of ocular alignment. Reliable measurement of the deviation is often hindered by the variable nature of the strabismus, and without careful observation...