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  • Title: The surgical outcome of inferior oblique recession on bilateral superior oblique palsy in children.
    Author: Masaya-anon P, Subhangkasen I, Hiriotappa J.
    Journal: J Med Assoc Thai; 2009 Feb; 92(2):217-23. PubMed ID: 19253797.
    Abstract:
    OBJECTIVE: To study the surgical effects of bilateral graded inferior oblique muscle (IO) recession on the reduction of the V pattern deviation and severity of inferior oblique muscle overaction (IOOA) in children who had bilateral superior oblique muscle palsies (SOP) with secondary inferior oblique muscle overaction. MATERIAL AND METHOD: Seven patients who presented with bilateral SOP with secondary IOOA were included. All patients had V pattern deviation and bilateral graded IO recession was done. The data of age, sex, deviation in primary position, V pattern and severity of IOOA was recorded both pre- and post -operatively. The comparison of pre-operative and post-operative amount of V pattern and IOOA was analyzed with nonparametric statistical analysis. RESULTS: Four females and three males had the average age of 5.7 +/- 1.8 years old. The mean pre-operative severity of IOOA was + 3 and the mean pre-operative deviation of the V pattern was 36 +/- 11.4 prism diopters (PD). The mean post-operative severity of IOOA was + 0.4 and of V pattern deviation was 10.7 +/- 4.4 PD. Comparing the pre-operative and post-operative severity of lOOA and V pattern deviation by non-parametric statistical analysis and the result was statistically significant. CONCLUSION: Bilateral graded IO recession is an effective surgical procedure to reduce the V pattern and the severity of IOOA in the children who are suffering from bilateral SOP with secondary IOOA.
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