Strabismus surgery distribution during 10-year period in a tertiary hospital

Background There is no large population-based study of the distribution and changing trend of strabismus surgeries in China. This study aimed to investigate the distribution and the changing trend of strabismus surgery in a tertiary hospital of China. Methods A retrospective study of all the strabismus surgeries performed in Beijing Tongren Eye Center from 2003 to 2012 was carried out. Characteristics analyzed included the type of strabismus, age, and gender. Results Totally 26 524 strabismus surgeries were performed in Tongren Eye Center during the 10-year period. The number of surgeries increased steadily from 1 507 in 2003 to 3 482 in 2008 and slightly decreased to 3 124 in 2009, but there was a sharp drop to 2 569 in 2010 and then kept relatively steady at 2 760 in 2011 and 2 463 in 2012. Intermittent exotropia (30.3%) was the most common among all kinds of strabismus. The number of strabismus surgeries performed on children under 12 years of age (43.60%) was significantly higher than those of the other age groups (P <0.05). Unilateral superior oblique paralysis was the most common subtype of paralytic strabismus (8.64%). Conclusions The type distribution of strabismus surgery has changed during the recent decade. The age and type distribution of different strabismus remained basically constant, among which intermittent exotropia was the most common.