[Surgical overcorrection squint angle in extropia related to retinal correspondence relationship]

Exotropia is the type of concomitant strabismus with wide clinic symptoms, and sensorial relationships. We have analyzed the patients with different types of divergent strabismus, the condition of sensors before and after operation, and influence of retinal relationships to post-operative result, with regards to long-time stablization of the angle of anomaly and stereo acuity.

there were 30 patients examined and surgically treated in the Orthpleotics Department of the Eye Clinic of Clinical Center of Sarajevo University.

Average age of the patients is 8 years, 13 male (43.34%) and 17 female (56.66%). Deviation angle was, at 11 (36.66%) cases less than -10 degrees, and in 19 cases (63.34 %) over -1 degrees. Stereo acuity before the surgery was found at 9 (30%) patients, 21 (70%) without stereo acquity. RKK at 9 (30%) cases was normal, at 19 (63.34%) was ARK, and at 2 (6.6%) there was double correspondence. With patients with surgical overcorrection of the anomaly angle from +1 degrees to +5 degrees, we had a good result with 13 (43.34%) cases, as well as good stereo acuity on all tests, ortophoria with 7 (23.34%) patients, with variable stereo acuity and variable correspondence, and 10 (33.32%) undercorrected with ARKK, low stereo cooperation and bad estetic result.

In cases where the surgical overcorrection was done, we get the best functional and esthetic results. Binocular cooperation was stabile, the deviation angle was low esophoria, with good fusion. The experiences of other authors also learn us about positive effect of surgical overcorrection of at least +4 degrees to +5 degrees.

Author concludes that, in a case of surgical treatment of exotropia, it is enough to do overcorrection of angle because of getting more stabile postoperative results.