1.Methods The optometer is composed of singlechip, handle and LCD.The eyesight is examined by selecting exposure of random sample eye-chart mark E within direction keys on the handle.
1.采用微计算控制视力检测仪,其由
、手柄和液晶显示屏构
,手柄具有上下左右方
能键,根据手柄上的按键选取随
出现视标"E"朝
的正确与否来检测视力。