Prevalence of amblyopia and strabismus in Hani school children in rural southwest China: a cross-sectional study

• DOI: 10.1136/bmjopen-2018-025441
• Publication Date: 2019-02-09T18:25:18Z
• Authors: Hui Zhu; Chenwei Pan; Qigang Sun; Dan Huang; Zhujun Fu; Jing Wang; Xuejuan Chen; Zijing Wang; Hu Liu
• Keywords: Esotropia; Cross-sectional study; Fundus (uterus)

Purpose To determine the prevalence rate of amblyopia and strabismus in Chinese Hani ethnic school-aged children. Methods All grade 1 7 students Mojiang Autonomous County, located southwest China, were invited for comprehensive eye examinations performed by experienced ophthalmologists optometrists, including visual acuity, ocular alignment movements, cycloplegic autorefraction, anterior segment fundus examinations. Standard definitions applied to calculate their rate. Results A total 1656 (91.0% response rate) 1394 (92.8% participated study. Amblyopia was present 25 (0.82%, 95% CI 0.55% 1.20%), with no significant differences (p=0.42) gender (p=0.69). Among these amblyopic children, 17 had unilateral eight bilateral amblyopia, 16 anisometropic, binocular refractive one strabismic. Strabismus found 59 (1.93%, 1.50% 2.48%), 47 intermittent exotropia, six constant five esotropia superior oblique palsy. The higher than borderline significance (2.44%vs1.50%, p=0.07), but similar (2.16% boys vs 1.68% girls, p=0.36). Conclusion school children are both lower that previously reported Han China many other racial/ethnic populations from non-China studies. Refractive error is major cause exotropia primary type.