Research on a distance-adaptive visual function self-examination system based on a tablet computer
10.16289/j.cnki.1002-0837.2024.03006
- VernacularTitle:基于平板电脑的距离自适应视功能自测方案的研究
- Author:
Mingqin WANG
1
;
Zidong CHEN
;
Yuning ZHANG
;
Xiaoyuan SHEN
;
Yanmei FAN
;
Minbin YU
Author Information
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
- Keywords:
space flight associated neuro-ocular syndrome;
visual function testing;
distance adaptation;
high-pass optotype
- From:Space Medicine & Medical Engineering
2024;35(3):166-172
- CountryChina
- Language:Chinese
-
Abstract:
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?
