Postoperative changes in alignment in patients surgically corrected for Esotropia and Exotropia in a Tertiary Government Hospital

Objective@#To compare the postoperative alignment of patients surgically corrected for esotropia or exotropia 6 weeks and 6 months after surgery.@*Method@#This retrospective study reviewed clinical records of patients who underwent horizontal muscle surgery at the University of the Philippines-Philippine General Hospital from 2010 to 2014. The changes in alignment from 1 week to 6 weeks and from 1 week to 6 months after surgery were compared for overcorrection, undercorrection, and adequate correction groups. ANOVA and Pearson correlation were used.@*Results@#Twenty two esotropia and 10 exotropia patients were included. Overcorrected esotropia patients had an esotropic change in alignment (15.50+13.44 PD after 6 weeks, p=0.026; 25+18.38 PD after 6 months, p=0.008). Under corrected esotropia patients had an exotropic change in alignment (-1.25+5.91 PD after 6 weeks, p=0.026;-4.38+14.16 PD after 6 months, p=0.008). Undercorrected exotropia patients had an esotropic change in alignment (6.67+6.35 PD after 6 weeks, p=0.028; 6+9.85 PD after 6 months, p=0.024). The presence of vertical deviations in esotropia caused an exotropic change in alignment after 6 months (p=0.03).@*Conclusion@#Although an exotropic drift is more commonly reported, fusional vergences may account for postoperative alignment changes towards orthotropia.

Factors Affecting Stereopsis After Pediatric Cataract Surgery

PURPOSE: To evaluate factors influencing stereoacuity outcomes after pediatric cataract surgery. METHODS: We retrospectively reviewed 38 eyes of 22 patients who had undergone irrigation and aspiration of cataracts and primary posterior chamber intraocular lens implantation from February 1992 to July 2006. In all patients, stereoacuity was assessed with the Titmus stereo test. Patients were divided into two groups according to stereoacuity: group 1 (n=9) had a stereoacuity less than 100 sec/arc; group 2 (n=13) had a stereoacuity more than 100 sec/arc. Nine variables associated with stereoacuity were evaluated in each group. RESULTS: Postoperative strabismus was the strongest factor influencing the stereoacuity level. Good postoperative mean visual acuity was related with good stereoacuity. Though mean visual acuity in two children with exodeviation over 30PD was 0.7 and 0.8, their stereoacuity was 400 sec/arc. Showing little difference in the spherical equivalent between the eyes was also related to good stereoacuity. CONCLUSIONS: Postoperative strabismus onset, postoperative mean visual acuity between the two eyes, and differences in the spherical equivalent were important factors influencing stereoacuity in patients after pediatric cataract surgery.