Yasuma T, Miyakawa N, Yamazaki J
Jpn J Ophthalmol. 1986;30(3):330-7.
A perimeter was constructed, using red light-emitting diodes by remodeling a Foerster's perimeter, to test three time-dependent visual functions, ie, double flash resolution (DFR), which is the time threshold of double flash separation, critical flicker fusion frequency (CFF), which is the threshold of flicker separation and perceptual delay (PD), which is the difference in perception between two locations of the visual field. In 10 normal subjects, the DFR and CFF were determined in the center of the field and in 12 points in the paracentral field 10 degrees away from the center. The CFF value was lower in the center than in the paracentral field where no significant difference was found among various meridians. The DFR values showed a marked individual variation. The value was significantly higher in the upper and lower paracentral fields than in the nasal and temporal fields: the DFR in the center of the field showed no significant difference from the DFR in the nasal and temporal paracentral field. The PD was determined between the center and paracentral fields. Individual variation was small and no significant difference was found among the paracentral fields. These results in normal subjects offer a reference for clinical application of the present test methods for various diseases.
通过改造福斯特视野计，使用红色发光二极管构建了一种视野计，以测试三种与时间相关的视觉功能，即双闪光分辨力（DFR），它是双闪光分离的时间阈值；临界闪烁融合频率（CFF），它是闪烁分离的阈值；以及感知延迟（PD），它是视野中两个位置之间的感知差异。在10名正常受试者中，在视野中心以及距中心10度的旁中心视野的12个点处测定了DFR和CFF。中心的CFF值低于旁中心视野，在旁中心视野的各个子午线之间未发现显著差异。DFR值显示出明显的个体差异。上下旁中心视野的值显著高于鼻侧和颞侧视野：视野中心的DFR与鼻侧和颞侧旁中心视野的DFR无显著差异。在中心和旁中心视野之间测定了PD。个体差异较小，旁中心视野之间未发现显著差异。正常受试者的这些结果为目前针对各种疾病的测试方法的临床应用提供了参考。
