مقايسه تاثير دو روش جراحي استاندارد و فيكساسيون خلفي در درمان ازوتروپي با همگرايي بالا

Comparison Between Conventional and Faden Operation in Treatment of High Accomodative Convergence / Accommodation Ratio Esotropia

Background and Objectives: A variety of non - surgical and surgical techniques have been used for treatment of high AC/A ratio esotropia (ET). This study was conducted to compare the results of conventional and posterior fixation (PF) suture techniques in the treatment of high AC/A ET at Nikookari Hospital from Jan 2001 to Mar 2002 . Materials and Methods:In this sequential matched randomised double blind clinical trial, 20 patients aging 3-13 years old with high AC/A ET (esodeviation measured in near fixation at least 10 pd more than distance fixation) were studied. These patients were divided into two groups randomely: 10 patients underwent the conventional operation(recession of both medial recti) and the other group operated on for posterior fixation technique. All the patients were examined one week, one month and six months after operation considering the distance and near deviation and the far near dispariety. Results: All the patients (100%) in PF group showed acceptable results (near deviation less than 10 pd and far near dispariety less than 10) one week after operation and during the six month follow up period (P<0.0001). In conventional group only 20% out of patients achieved acceptable results six months after operation. Conclusion: This study showed that PF operation is more effective in treatment of high AC/A esotropia than the conventional technique.