眼科Hess屏检查自动装置

Automation of Hess screen test for ophthalmology

本文介绍的斜视测试装置是应用二维角度传感器连接绿光斑灯。将角度信号转换成电压，并送入８０９８单片机。被测者在Ｈｅｓｓ屏上的各点实测位置，由ＰＰ－４０打印机输出。

The Hess screen test is for check up of eye's strabismus or wall-eye.Traditional method is used by an ophthalmologist in a dark house,which is tedious and not accurate.This paper describes a unit:a two dimension angle sensor connected to green-light-torch held by patient and the angle data are sent to A/D channels of microprocesor 8098,then calculated,the next test red light being turned on by high speed channels. Final test results are plotted to plotter PP-40,all procedures are automatical and accurate.