COMPARISION OF STREOPSIS IN PATIENTS WITH FULLY AND PARTIALLY ACCOMMODATIVE ESOTROPIA

Abstract

PURPOSE: To evaluate stereopsis in patients with fully and partially accommodative esotropia.

METHODS: A total of 60 patients 31 with fully accommodative and 29 with partially accommodative esotropia patients were included in the study to compare the outcome of stereopsis using four stereoacuity test (Lang I test, Lang II test, Lang 2 Pencil test, and Frisby test) the visual acuity and strabismus screening were assessed according with patients age and standard charts and instruments to rule out the degree of visual acuity and the size and the type of deviation, and stereoacuity of all were measured using the four Stereoacuity tests. This study was conducted using predesigned Performa, in College of Ophthalmology and Allied Vision Science Mayo Hospital Lahore, Pakistan.

RESULT: 25(41.7%) were male and 35(58.3%) were female, with a mean age of 9.52. Out of 60 patients, 31(51.7%) were having fully accommodative esotropia and 29(48.3%) were having partially accommodative esotropia. The test result of stereoacuity using four tests revealed presence of good stereoacuity detection in patients with fully accommodative esotropia and poor stereoacuity in partially accommodative esotropia. Of all 31 patients with fully accommodative esotropia, 22 patients (36.67%) were able to read 550 Sec of Arc in Lang I test and 18 (30%) read 200 Sec of Arc in Lang II Streoacuity chart, in Frisby test, 24 patients (40%) detected disparity between 85-340 Seconds of arc and only 3 (5%) showed no Stereoacuity in Frisby test. While patients with partially accommodative esotropia; however, demonstrated poor Stereoacuity outcome in all four tests. of all 29 patients 13 (21.67%) had 1200 seconds of arc and 12(20%) showed no Stereoacuity and only 4 patients (6.67%) revealed 600 seconds of arc, in Lang II test 8.33% out of 48.3 %, had Stereoacuity of 600 seconds of arc and 40% had no Stereoacuity. similarly, 45. % out of 48.3 % showed no stereopsis in Frisby test; however, both patients showed almost similar results in Lang 2 Pencil test, 18 patients (30%) and 12 patients (20%) revealed Stereoacuity of 3000-5000 seconds of arc in fully and partially accommodative esotropia respectively and the remaining showed no Stereoacuity.

CONCLUSION: The study result demonstrates the presence of good stereoacuity in patients with fully accommodative esotropia and Poor stereoacuity detection in partially accommodative esotropia in three tests (Lang I, Lang II, Frisby test) however similar stereoacuity, outcome was revealed in Lang 2 pencil test both study population.