Recession Vs Myotomy–Comparative Analysis of Two Surgical Procedures of Weakening Inferior Oblique Muscle Overaction

INTRODUCTION Inferior oblique overaction (IOOA) can be primary or secondary, isolated or combined to other types of horizontal deviation, mostly with esotropias. Surgical weakening of IOOA means several techniques like; recession, myotomy, myectomy, anteroposition etc. GOALS we analyzed the effect of inferior oblique muscle surgical weakening comparing two groups of patients with primary hypertropia. MATERIAL AND METHODS In 5-years retrospective study, we observed 33 patients on which we did the surgical procedure of weakening inferior muscle overaction by two methods; recession and myotomy. RESULTS In total number of 33 patients, there were 57,6% male and 42,4% female patients with average age of 10,6±7,5 (in range of 4-36). There was 33,3% of isolated primary hypertropias, and 66,7% combined with esotropias. At 23 (69,9%) patients the recession surgical procedure was done, and with 10 (30,1%) myotomy. Better effect and binocularity was in 65,2% of patients in recession group which was statistically significant with significance level of p<0,0, χ2=5,705; p=0,021. CONCLUSION Comparing of two surgical procedures of weakening inferior oblique muscles overaction, recession is better procedure than myotomy.