CONCLUSION: Binocular or monocular medial rectus muscle resection in treatment of convergence insufficiency concomitant exotropia has satisfactory effect.

Given the ultrasound findings, an orbital biopsy, rather than a decompression, was performed. An irregular mass was noted adjacent to the right medial rectus muscle.

Conclusions Myositis was one of the uncommon clinical subtypes of IOIP, Superior rectus was the most involved muscle, followed by lateral, medial and inferior rectus.