Prism therapy in the pre-operative results of the intermittent exotropies and its effect on the postoperative results in children between 2 and 11 years old

Abstract

The purpose of this study was to compare the influence of prism therapy in the postoperative results of the intermittent exotropies with a year of following. <em><strong>Methods:</strong></em> a prospective study was carried out to 28 children between 2 and 11 years old with primary intermittent exotropies between 20 and 40 prismatic diopters. Those children were examined in the department of ophthalmology of the clinica Colsubsidio. Age, the angle of deviation, and the presence of primary intermittent exotropies were the eligibility criteria. The sample was randomly distributed in two groups; the first one was treated with Fresnel prism for 4 weeks, before the symmetric surgery of strabismus, while the second one did not. The post operative result was evaluated in both groups and the probability of future surgical operations was taken into account. Clinic results were better in the group treated with prism regarding postoperative residual angle and the response to stereopsis. The possibility of future surgical operations was lower in this group. Statistically there were no significant differences in both groups response.