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does it happen, and can medial rectus advancement correct it? J AAPOS. 2014;18:554-558. 16. Ganesh A, Pirouznia S, Ganguly SS, et al. Consecutive exotropia after surgical treatment of childhood esotropia: a 40-year follow-up study. Acta Ophthalmologica. 2011;89: 691-695. 17. Santiago AP, Rosenbaum AL. Strabismus reoperation: strategies and techniques. In: Clinical Strabismus Management: Principles and Surgical Techniques. Phliadelphia: Saunders; 1999:507-515. 18. Cherfan CG, Traboulsi EI. Slipped, severed, torn and lost extraocular muscles. Can J Ophthalmol. 2011;46:501-509. 19. Plager DA, Parks MM. Recognition and repair of the “lost” rectus muscle. A report of 25 cases. Ophthalmology. 1990;97: 131-136. discussion 136-137. 20. Hakim OM, Gaber El-Hag Y, Maher H. Persistence of eye movement following disinsertion of extraocular muscle. J AAPOS. 2008;12:62-65. 21. Kushner BJ, Fisher MR, Lucchese NJ, Morton GV. How far can a medical rectus safely be recessed? J Pediatr Ophthalmol Strabismus. 1994;31:138-146.