指向式背光显示视力筛查系统的应用研究

Research on Vision Measurement System Based on Directional Backlight Display

近视是青少年的高发病,它将严重影响患者的学习与生活,甚至还会影响国家的稳定发展。因此,近视防控已成为国家的重要政策。目前,由于缺少验光师,导致偏远农村中小学生视力筛查困难,不利于农村地区中小学生的近视防控工作开展。因此,提出一种以指向式背光为显示载体的视力筛查系统。在粤西乡村中学的试验结果表明,该系统可以对青少年群体完成视力、色盲、立体视及双眼平衡共4个视力指标的筛查测试,平均每人筛查时间仅为4 min。

Myopia is a high incidence of teenagers.It will seriously affect the study and life of patients,and even affect the stable development of the country.Therefore,myopia prevention and control has become an important national policy.At present,the gap of optometrists makes it difficult to screen the eyesight of primary and middle school students in remote rural areas,which is not conducive to the prevention and control of myopia in rural areas.Therefore,this paper proposes a vision screening system using directional backlight as display carrier.After the experiment in rural middle schools in western Guangdong,the system proves that it can complete the screening test of four visual indicators:vision,color blindness,stereopsis and binocular balance,and the average screening time per person is only 4 minutes.