Apparatus for Kinetic Visual Acuity and Dynamic Visual Acuity

研制了动态视敏度（KVA）、动态视敏度（DVA）和短曝光时间视敏度测量仪。其特点如下：(1)目标速度在静态至100km/h的大范围内变化，有向前、向后、水平两个方向。我们可以在以上范围内设置7级速度。(2)目标呈现位置为前进方向70 -4m，水平方向+-2.0度。(3)曝光时间从1/1000秒到1秒可分为7级。(4)靶材尺寸可选，靶材颜色可选白、红、绿、蓝、黄，背景照度在0.1 ~ 200cd/m2。进一步，我们对该装置的性能进行了检查，并对其性能进行了确认。此外，我们测量了受试者的动态视敏度。结果表明：在100Km/h以内，随着目标速度的增加，运动视敏度逐渐降低。KVA还取决于目标的背景照度。由此可见，所研制的仪器可用于解决眼疲劳和交通眼科。

We developed the apparatus for measuring kinetic visual acuity (KVA) , dynamic visual acuity (DVA) and visual acuity with short exposure time.The features are as follows :(1) The target velocity is variable in wide range from static up to 100km/h, in two direction forward and backward, horizontal. We can set in 7 stage of velocity in above range.(2) The target presented position are 70m-4m in forward and +-2.0 degrees in horizontal.(3) The exposure time is variable in 7 stages from 1/1000sec to 1sec.(4) The four target sizes are available, target colors can be selected from white, red, green, blue and yellow, background illuminance is in 0.1 to 200cd/m2.Further, We checked this apparatus performance and confirmed the performances.In addition, We measured the kinetic visual acuity for subjects. The results are : the kinetic visual acuity decreased slowly with increasing target velocity up to 100Km/h. The KVA also depends on background illuminance of target. From these, the developed apparatus is considered to be useful in solving ocular fatigue and traffic ophthalmology.