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目的:用计算机控制检测研究视力时间阈值。方法:用pascal语言程序设计视标。视标的大小、显示程序和持续时间由计算机控制。受试者从距离显示器5m处看视标。采用阶梯法测试不同视力受试者的视力时间阈值。结果:检测到约为毫秒级的视力时间阈值。视力1.0组的视力时间阈值平均约为28.10msec,视力1.2组的视力时间阈值平均约为27.90msec,视力1.5组的视力时间阈值平均约为27.80msec。结论:视力与视力时间阈值不成正比,视力好的个体其视力时间阈值不一定短。
Objective: To test the threshold of visual acuity by computer control. Method: use pascal language program design visual target. Depending on the target size, the program and duration are controlled by the computer. The subject looked at the target 5 m away from the display. The step-by-step method was used to test the vision threshold of different visual acuity subjects. Results: Eye time threshold of approximately milliseconds was detected. Visual acuity 1.0 group, the average visual acuity threshold of about 28.10msec, visual acuity 1.2 group, the average visual acuity threshold of about 27.90msec, visual acuity 1.5 group, the average visual acuity threshold of about 27.80msec. Conclusion: The threshold of visual acuity is not proportional to the time threshold of visual acuity. The visual acuity threshold of individuals with good acuity may not be short.