客观调节性集合/调节比率的研究  

Objective analysis of the accommodative convergence/accommodation ratio

作　　者：徐丹[1] 徐菁菁[1] 吕帆[1] 

机构地区：[1]温州医学院眼视光学院,浙江温州325027

出　　处：《眼视光学杂志》2009年第5期378-381,共4页Chinese Journal of Optometry & Ophthalmology

基　　金：浙江省自然科学基金项目(602168);浙江省自然科学基金青年人才基金(RC9606);温州市科技局基金(S2002A034)

摘　　要：目的利用眼动追踪仪和红外自动验光仪获得刺激性调节性集合/调节(accommodative convergence/accommodation,AC/A)和反应性AC/A值,分析两者相关性及差异。方法选取34名健康在校学生和年轻工作人员[年龄为20～35岁,平均(25.8±3.4)岁],在集合反馈回路打开(遮盖左眼)的条件下,用310型眼动追踪仪分别记录调节性集合;用wv500红外自动验光仪测量注视眼在各调节刺激下的调节反应,从而分别得出刺激性AC/A和反应性AC/A,对两者数据采用配对t检验进行分析。结果用眼动追踪仪法测量所有受试者所得的刺激性AC/A和反应性AC/A有显著相关性(r=0.871,P=0.000)和明显差异,反应性AC/A为(7.50±3.60)△/D,刺激性AC/A为(4.77±1.84)△/D,反应性AC/A平均值与刺激性AC/A平均值相比为1.57,两者差异有显著统计学意义(P=0.000)。结论反应性AC/A高于刺激性AC/A,大多数个体均有一定程度的调节滞后量。Objective An eye tracker and infrared autorefractor were used to measure the response and stimulus AC/A ratios.The correlation and difference between these two parameters were analyzed.Methods Thirty-four healthy college students and young faculty（25.8 years old on average） were enrolled.In the open-loop condition（left eye occluded）,convergence and accommodation were measured by using a Model 310 eye tracker and a WV500 infrared autorefractor with different viewing distances.The stimulus and response AC/A ratios were then obtained and analyzed.Results There was a statistical correlation and a difference between the stimulus AC/A ratio and response AC/A ratio for these subjects.The mean ratio of response AC/A ratios versus the stimulus AC/A ratios was 1.57.Conclusion The response AC/A ratio（7.50±3.60） △/D was higher than the stimulated AC/A ratio（4.77±1.84）△/D,P=0.001.The difference occurs because most subjects show consid-erable accommodative lag.

关 键 词：眼动追踪仪 刺激性AC/A 反应性AC/A 调节性集合 调节反应 

分 类 号：R778.11[医药卫生—眼科]