目的：通过三棱镜融合储备力试验检查了解正常青少年的双眼水平融像性聚散范围。方法：横断面研究，随机分层整群抽样调查。在汕头地区调查9所城乡中小学校，共7 537人。从体检学生中抽取双眼正常学生4 012名，用排状三棱镜检查双眼近距水平聚散力，在融像破裂点记录三棱镜度数。按集合与散开、年龄、性别等因素对结果作分层统计分析。结果：总体检人数7 464人，其中双眼祼眼视力≥0.8为4 012人，占体检人数的53.75%；研究对象的双眼散开运动范围平均为15.87△±10.74△，双眼集合运动范围平均为26.41△±12.04△；4~8岁组及9~11岁组的双眼集合与散开运动范围均高于12~20岁组，差异有统计学意义(P<0.05)；女性的双眼集合能力高于男性。结论：在本调查人群中，双眼集合运动的储备力高于散开运动；年龄越小，双眼异向运动的储备力越强。

Objective: To investigate the fusional range by using prism bar among students in Shantou City of Guangdong Province, China. Methods: This was a cross-sectional study that included 4 012 normal eye subjects among randomly selected 7 537 students aged 6 to 19 years from 9 schools in Shantou City. Horizontal fusional range measured with prism bar. Statistical analyses were performed using SPSS statistical software to investigate the association of age, gender, vergence and divergence. Results: A total of 7 464 students were examined, including 3 928 boys and 3 536 girls, mean age 11 years. The number of students with binocular vision ≥0.8 was 4 012, accounting for 53.75% of the number of fusional examination; the mean vergence range was 15.87△±10.74△, and the mean divergence range was 26.41△±12.04△. The vergence and divergence range group of 4 to 8 years and 9 to  11 years students was higher than the group of 12 to 20 years, the difference was statistically significant (P<0.05). The vergence range of female students was higher than that of male students. Conclusion: In this study, the vergence range is higher than divergence. With an increase in ages, the range of vergence and divergence decreases.