三棱镜排镜法和同视机法测量正常儿童双眼运动融合功能的差异

Measuring binocular fusion in normal children： A comparison between the prism bar method and synoptophore method

目的 对比三棱镜排镜法和同视机法对正常儿童的融合性辐辏和融合性分开运动检查的异同.方法 横断面研究.收集8～15岁无眼部疾患并且进行充分屈光矫正的儿童100例,分别采用同视机和三棱镜排镜法测量融合性分开运动和融合性辐辏运动的破裂点和恢复点.各种检查均重复3次,取平均值,采用独立样本t检验对比2种方法测量结果的异同,相关性分析采用Spearman相关分析.结果 当三棱镜排镜分别放置在主导眼和非主导眼时,融合性辐辏运动和融合性分开运动看远和看近时的破裂点和恢复点差异均无统计学意义.同视机和三棱镜排镜检测融合性辐辏和分开运动的破裂点数据呈正相关（辐辏运动r=0.60,P＜0.01,分开运动r=0.46,P＜0.05） 视远时,无论融合性辐辏还是融合性分开运动,分别采用同视机和三棱镜排镜检查的破裂点和恢复点的差异均无统计学意义.结论 三棱镜排镜法在检测正常儿童看远的融合性辐辏与分开运动时与同视机法可获得相近的效果。

Objective To evaluate differences between the prism bar and synoptophore methods in the measurement of fusional convergence and fusional divergence in normal children.Methods This was a prospective research study.Children aged 8 to 15 years who had no ocular disease were recruited and tested with their prescribed refractions.The break and recovery points of fusional convergence and fusional divergence were measured by the prism bar and synoptophore methods respectively.Each test was repeated 3 times.An independent samples t-test was used to compare the difference between the 2 methods.Correlation between the two methods was analyzed by a Spearman rank correlation.Results There were no differences in break and recovery points of fusional vergences between dominant eye and non-dominant eye.There were positive correlations between break point values measured by the synoptophore and prism bar （convergence r=0.60,P〈0.01; divergence r=0.46,P〈0.05）.When measured by the prism bar and synoptophore respectively,no significant differences could be found for either the values of the break points or that of recovery points of the 2 methods.Conclusion When measuring the distance fusional vergences,prism bar and synoptophore with similar effect.