背景:融合储量因测量方法而异。这项研究的目的是比较使用步进和斜坡法测量正负融合储量时的主观和客观反应。
方法:使用单倍体系统测量融合储量。使用EyeLink1000Plus眼睛跟踪器(SRResearch)记录眼睛运动。将刺激差异更改为模仿棱镜条(台阶)或Risley棱镜(斜坡)。主观反应是通过按下键盘上的一个键获得的,而客观断点和恢复点是使用Matlab中编码的自定义算法离线确定的。
结果:33名成年人参与了这项研究。对于斜坡法,主观和客观的反应是相似的负(中断和恢复点(t(32)=-0.82,p=0.42)和(t(32)=0.42,p=0.67),分别)和正合成储备(断点和恢复点(U=-1.34,p=0.18)和t(19)=-0.25,p=0.81),分别)。对于Step方法,当主观和客观地测量断裂(t(32)=1.27,p=0.21)或恢复点(U=-2.02,Bonferroni-adjustedp=0.04)时,未观察到正融合储量的显著差异.对于负的融合储备,对于断裂点或恢复点(U=-0.10,p=0.92和t(19)=1.17,p=0.26),差异均不显著.
结论:用斜坡法和步法测量时,主观和客观反应表现出良好的一致性。
BACKGROUND: Fusional reserves differ with the method of measurement. The goal of this study was to compare the subjective and objective responses during the measurement of positive and negative fusional reserves using both step and ramp methods.
METHODS: A haploscopic system was used to measure fusional reserves. Eye movements were recorded using an EyeLink 1000 Plus eye tracker (SR Research). The stimulus disparity was changed to either mimic a prism bar (steps) or a Risley prism (ramp). Subjective responses were obtained by pressing a key on the keyboard, whereas objective break and recovery points were determined offline using a custom algorithm coded in Matlab.
RESULTS: Thirty-three adults participated in this study. For the ramp method, the subjective and objective responses were similar for the negative (break and recovery points (t(32) = -0.82, p = 0.42) and (t(32) = 0.42, p = 0.67), respectively) and positive fusional reserves (break and recovery points (U = -1.34, p = 0.18) and t(19) = -0.25, p = 0.81), respectively). For the step method, no significant differences in positive fusional reserves were observed when measured subjectively and objectively for the break (t(32) = 1.27, p = 0.21) or the recovery point (U = -2.02, Bonferroni-adjusted p = 0.04). For the negative fusional reserve, differences were not significant for either the break or recovery points (U = -0.10, p = 0.92 and t(19) = 1.17, p = 0.26, respectively).
CONCLUSIONS: Subjective and objective responses exhibited good agreement when measured with the ramp and step methods.