Original ArticlesAssessment of central and peripheral fusion and near and distance stereoacuity in intermittent exotropic patients before and after strabismus surgery
Section snippets
Methods
Between 1994 and 1997, all consecutive patients with X(T) who were undergoing surgery as the initial surgical management of this condition at the Gulhane Military Medical Academy Eye Clinic were evaluated for their motor and sensorial status preoperatively and postoperatively. Criteria required for inclusion in this prospective, institutional, clinical trial included: no more than 2 lines of difference in best-corrected visual acuity between both eyes as determined by Snellen letters or
Results
During the enrollment period, 38 patients with X(T) underwent surgery at our clinic. This study includes the results of measurements of 26 patients (68%) with X(T) who met the inclusion criteria and underwent surgical correction; 12 (32%) were eliminated on the basis of the aforementioned exclusion criteria.
Of 26 patients with X(T), 18 (69%) had a successful alignment at distance, and eight (31%) had an unsuccessful alignment, depending on their measurements 1 year after surgery. As shown in
Discussion
The data in this study suggest that the distance alternate-letter suppression test should be used to assess sensorial status in patients with X(T) for several reasons. First, it was found that 35% of patients with X(T) demonstrated central suppression preoperatively and postoperatively with this test, in contrast to normal subjects, none of whom exhibited central suppression. Second, a correlation was shown between both preoperative and postoperative central fusion and distance stereopsis. The
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