Background
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A previous study by the research team* investigated current management of intermittent exotropia in 26 eye clinics across the UK, and the associated outcomes after a 2-year follow-up period. We found that those who underwent surgery improved significantly more than those who did not - however, the surgery group were on average worse to start with and therefore had more room for improvement, so it is not really fair to compare the groups. Furthermore, surgery came with a risk of becoming constantly 'overcorrected' whereby the eye was converging inwards rather than intermittently diverging outwards after the operation. This earlier research led us to realise that a randomised controlled trial was needed to help answer the question of whether surgery was better than active monitoring. *The 'Improving Outcomes in Intermittent Exotropia' (IOXT) study; 2006-2010
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