Purpose: To investigate the factors that influence the effect of nasal transposition of inferior rectus (IR) muscle.
Patients and methods: Over the 5-year from 2011 to 2016, we recruited 84 patients (mean age 61.4 years) who were diagnosed as excyclotropia and underwent IR nasal transposition with one muscle width. Cyclodeviation was measured by a major amblyoscope and surgical effect of IR nasal transposition was determined by the difference between preoperative excyclodeviation and excyclodeviation 1-month later. We investigated retrospectively whether the age, etiology of dilopia and preoperative vertical and horizontal deviation affected the surgery effect.
Results: The corrective effect of excyclodeviation averaged 5.9° in all cases. There was no statistical significance in the difference between the age and the corrective effect of excyclodeviation (p=0.7131), and also the etiology (p=0.4510) and preoperative vertical and horizontal deviation had no relationship with the surgical effects (vertical, p=0.6088; exotropia, p=0.9222; esotropia, p=0.9806).
Conclusion: The corrective effect of excyclodeviation of IR nasal transposition was kept stable regardless of age, etiology of diplopia, preoperative vertical and horizontal deviation.
Nippon Ganka Gakkai Zasshi (J Jpn Ophthalmol Soc) 121:707-711, 2017.