Ambulatory Monitoring with Eye Tracking Glasses to Assess the Severity of Intermittent Exotropia

Intermittent exotropia affects about 1% of the population. It usually remains intermittent, with patients flipping between two states: 1) bifoveal fusion with intact stereopsis versus 2) exotropia with peripheral temporal retinal suppression. There is no consensus regarding when ophthalmologists should intervene with eye muscle surgery. 'Control' scores have been devised to guide this decision, but they are based on brief office observations. In this study, we explored the use of wearable eye tracking glasses to quantify the percentage of time that exotropia is present.