Horizontal recti-down displacement for unilateral dissociated vertical deviations – A case series

This is a case series of 3 patients of comitant horizontal deviations with unilateral dissociated vertical deviations (DVD) who underwent half tendon down displacement of horizontal recti during recession resection surgery. Out of these 3 patients, 2 had exotropia and 1 had esotropia. The mean horizontal deviation preoperatively was 31.6 ± 7.6 prism diopters (PD) and post-operatively was 3.0 ± 2.6 PD. Mean preoperative DVD was 11.3 ± 1.1 PD which had a near-complete resolution in all patients. No increase in DVD of the other eye was noticed in any of the patients. None of the patients required second surgery for correction of horizontal deviation or DVD. The DVD was corrected in all patients with no complications. Half tendon down displacement with recession and resection surgery of horizontal recti is effective in the correction of unilateral DVD in selected patients.