The Value of Testing Binocular Visual Acuity in Intermittent Exotropia

Ann Hitch

Exotropia, constant or intermittent, is a frequent occurrence in Australia, and seems more common in the northern areas. Fusional control of such deviations may produce symptoms which cannot always be relieved by conventional orthoptics. It is important to investigate the role of accommodation in this respect. If excessive accommodation is involved in controlling the deviation the symptoms become dramatic; there may be a risk of ciliary spasm developing, and orthoptic treatment becomes more difficult.