AIM: To investigate pathogeny and effects of surgery on paralytic strabismus.

METHODS: A retrospective study was done in 46 patients with paralytic strabismus who underwent squint correction in our hospital from June 2010 to June 2013. Among 26 horizontal strabismus, the cases of extra rectus palsy was 16, internal rectus palsy was 10. Among all20 vertical strabismus, the cases of superior oblique palsy, superior rectus palsy, inferior rectus palsy, double elevator palsy counted for 7, 8, 2 and 3, respectively. Pathogenesis: trauma was 19 cases, followed by 10 cases that the causes could not be identified. Nine was congenital paralytic strabismus, 8 occurred after nose or brain surgery. The surgery methods included rectus muscle recession, rectus muscle resection, partial rectus muscle transposition, Jensen procedure, inferior oblique myectomy and anterior transposition of inferior oblique. Statistical software SPSS10.0 was used in chi-square test between two groups, while the situation of paralysis eye movements improved by two methods in the horizontal strabismus group was compared with t test.

RESULTS: Among all horizontal strabismus the rate of cure, improvement and inefficiency was 20(77%), 5(19%)and 1(4%), respectively. Among vertical strabismus the ratio of cure, improvement and inefficiency was 15(75%), 3(15%)and 2(10%). There was no significantly difference between the two groups(P>0.05). The movements of paralytic eyes were improved. Two procedures used in horizontal strabismus, can improve paralysis eye movements were 3.76±0.91, 3.72±0.84mm, with no significant difference(P=0.93)statistically.

CONCLUSION: Paralytic strabismus in adults had complicated conditions. Choosing different operation methods in treating paralytic strabismus according to the degree of paralysis can result in satisfactory cosmetically alignment of the eyes and modify head position and diplopia.