基于平板电脑的距离自适应视功能自测方案的研究  

Research on a distance-adaptive visual function self-examination system based on a tablet computer

作　　者：王铭钦 陈子东[1] 张宇宁 沈小元 范燕媚 余敏斌[1] Wang Mingqin;Chen Zidong;Zhang Yuning;Shen Xiaoyuan;Fan Yanmei;Yu Minbin(Zhongshan Ophthalmic Center,Sun Yat-sen University,Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science,Guangdong Provincial Clinical Research Center for Ocular Diseases,Guangzhou 510060,China)

机构地区：[1]中山大学中山眼科中心,眼病防治全国重点实验室,广东省眼科视觉科学重点实验室,广州510060

出　　处：《航天医学与医学工程》2024年第3期166-172,共7页Space Medicine & Medical Engineering

基　　金：中国载人航天工程空间医学实验项目(HYZHXM01015)。

摘　　要：目的构建基于平板电脑的距离自适应视功能自测系统,并分析其精确性。方法基于配有摄像头的平板电脑,使用ArUco技术识别2 m范围内的二维码以进行实时测距,构建距离自适应的集视力(普通视标视力和不同对比度高通视标视力)、调节幅度和中心5°视野测定一体化的视觉功能检测系统。共纳入健康受试者22例(44眼)完成视功能检查,其中6名受试者在四种距离(1 m、1.25 m、1.6 m、2 m)分别完成视力测试,并在足矫和–3.00D欠矫模拟调节不足状态下分别完成调节幅度测试。比较程序读数距离和空间中二维码距平板屏幕实际距离;比较在不同距离的同种视标的视力测试结果一致性;分析足矫及欠矫状态下调节幅度的变化,并使用ICC法评估其可重复性;分析视野测试结果的对比敏感度阈值及有效性。结果实际距离与程序读数距离具有良好的一致性水平。相同对比度高通视标视力测试在不同距离的测试结果无显著差异(P>0.05),100%普通视标视力在0.9~1.1m距离范围内与其他距离结果存在显著差异(P<0.001)。测量3次调节幅度的ICC值为0.861(P<0.001);欠矫状态下的调节幅度较足矫状态更低,变化具有统计学差异(P<0.05)。双眼视野对比度阈值的上边缘值均值为16.92%,程序能正确识别视野缺损。结论本研究构建了一种基于平板电脑的距离自适应视功能自测系统,可在2 m内实时精准测距,根据距离自动调节初始视标的大小以精确呈现视标,进行视力、调节幅度及中心5°视野检测。该系统不受固定距离限制并且具有更高的检验效能,可应用于空间狭小且不能固定距离的空间站的视功能检测。Objective Aiming to develop a distance-adaptive visual function self-examination system based on tablet computers and evaluate its accuracy.Methods Utilizing ArUco technology on a tablet device equipped with the camera,a system was developed to assess visual functions by identifying QR codes within a 2-meters range for real-time ranging.This system integrates various visual function tests,including visual acuity test(conventional visual acuity test and high-pass visual acuity test with varying contrasts),accommodative amplitude test,and visual field test at the foveal(5°).A total of 22 healthy subjects(44 eyes)participated in visual function assessments,with 6 subjects undergoing visual acuity tests at varying distances(1 m,1.25 m,1.6 m,2 m)and accommodative amplitude tests under both refractive correction and simulated undercorrection of-3.00D.The program distance and actual distance were compared,the consistency of visual acuity outcomes for identical optotype at different distances were assessed,the accommodative amplitude under refractive correction and undercorrection were analyzed,the repeatability of accommodative amplitude outcomes was evaluated using Intraclass Correlation Coefficient(ICC),and the contrast threshold and efficacy of visual field test outcomes were analyzed.Results The program distance and actual distance showed good agreement.High-pass visual acuity tests with the same contrast showed no significant differences at different distances(P>0.05),while conventional visual acuity tests showed significant differences at distances of 0.9 to 1.1 meters compared to other distances(P<0.001).ICC of accommodative amplitude tests was 0.861(P<0.001).The accommodative amplitude was lower in the undercorrected state compared to refractive correction,with a statistically significant difference(P<0.05).The average extreme outlier of contrast threshold for binocular visual field was 16.92,and the program correctly identified visual field defects.Conclusion Based on a tablet computer,this study developed a d

关 键 词：航天相关神经眼综合征 视功能检测 距离自适应 高通视标 

分 类 号：R77[医药卫生—眼科] TP39[医药卫生—临床医学]