Abstract: Objective To analyze the etiology of consecutive exotropia (XTc) and discuss the effects of different operation methods. Design Retrospective case series. Participants 17 XTc patients diagnosed and operated in Beijing Tongren Hospital. Methods The clinic information of 17 XTc patients was reviewed. The presence age and operative age of esotropia, refraction, corrected visual acuity, operation method for correcting esotropia, as well as the onset age and operative age of XTc, angle of deviation, eye movement, refraction, binocular vision, operation methods for correcting exotropia and their effects were analyzed. Main Outcome Measures Onset age, refraction, angle of deviation, eye movement, operation method and the effect of surgical treatment. Results In all the 17 cases, there were 11 cases who were diagnosed as esotropia at the age of less than one year. The average age of esotropia operation was 6.79±5.39 years old (2~19 years). The average onset age of XTc was 9.00±4.97 years old (3~21 years). The refraction was -1.0~+2.0 D in 9 cases (52.9%), larger than +2.0 D in 7 cases (41.2%), and 1 case (5.9%) was high myopia (-10.0 D). Four cases were combined with single-eye amblyopia. Thirteen cases had no binocular vision. The average exotropia angle was 45△ (15△~95△) for near view and 50△ (20△~ 105△) for distant view, respectively. Five cases (29.4%) had limited adversion. medial rectus reductions were underwent in 3 cases, and medial rectus reduction plus lateral rectus recessions were underwent in 14 cases. After exotropia sugery, 14 cases (82.4%) were orthophoria, 3 cases had residual exotropia, and 1case was found exotropia drift half a year after surgery. The binocular function was improved after surgery. Conclusion The development of XTc is associated with the younger age of esotropia onset and esotropia sugery, combined with amblyopia, and absence of binocular function, etc. Personalized designed XTc surgery can provide better effect for the correction of the XTc. (Ophthalmol CHN, 2013, 22: 324-327)

Key words: consecutive exotropia, esotropia； postoperative complications