摘要
本系统以高分辨率造型功能,显示大小各异,缺口方向随机的“E”字造型。受检人可作远视力的自我测试。经逻辑比较,系统可鉴别受检人所辨认的“E”字缺口方向是否正确。测试过程终止,系统自动检索出受检人所测视力。同时显示测试过程中各“视力—辨认正确率”变化曲线。还可对色觉分辨能力与散光轴线方向作辅助检查。
By simulating the visual chart,vatious patterns of the letter'E'can be displayed on the screen,with its direction changeable at random.By pressing several remote control buttons,the patient can test his vision by himself.By logicall comparison,the system can judge whether the mark on the button pressed by patient identifies itself with the direction of the letter'E'on the screen.After test,the numerical value of patient's vision indicated by decimal can be retrieved.But this value must be the biggest of all values of the vision in which the rate of identification should be more than eighty per cent.In the meantime a diagram of curves about'vision-rate of identification'is displayed.
出处
《中国医疗器械杂志》
CAS
1992年第6期340-341,共2页
Chinese Journal of Medical Instrumentation
