singlechip

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.

采用微计算机控制视仪，其由单片机、手柄和液晶显示屏构成，手柄具有下左右方向等功能，根据手柄的按选取随机出现视标"E"朝向的正确与否来视。