人眼追踪远距离裸眼立体视觉检测系统的研制和测试

Evaluating stereo-acuity with distance glasses-free random dot stereo-test system via eye tracking method

目的应用人眼追踪技术研制裸眼随机点立体视觉检查系统(glasses-free random dot stereo-testsystem,GFRDSS),检测正常视力男性青年的5 m距离立体视锐度。方法在不同照度环境下检测230名正常视力、正常眼位男性青年的立体视锐度。观察组采用GFRDSS检测方法;对照组采用Distance Randot(DR)检测方法。结果GFRDSS可以检测视差范围40″~800″的5 m远距离立体视锐度。100~300 cd/m^2照度下,与对照组[41.3%(95/230)]比较,观察组有83.91%(193/230)受检者立体视锐度达到正常水平(40″~60″),差异有统计学意义(Z=-9.569,P<0.05)。350~600 cd/m^2照度下,与对照组[75.22%(173/230)]比较,观察组有84.78%(195/230)受检者立体视锐度达到60″,差异有统计学意义(Z=-4.048,P<0.05)。结论采用人眼追踪技术GFRDSS可以实现5 m距离无辅助立体视锐度检测,正常人群测试结果显示GFRDSS敏感性高于DR,且可以有效避免环境照度对检测的干扰。

Objective To utilize eye tracking techuology to develop a distance glasses-free random dot stereo-test system(GFRDSS)applying eyes detection and location method,and estimate the stereo-acuity of young men with normal vision from 5 meters distance.Methods A novel distance stereotest(GFRDSS)was proposed,which was constructed by a glasses-free autostereoscopic display and a corresponding 5 m-distance stereotest software.The distance stereo-acuity of 230 young men with normal vision was estimated by GFRDSS(experimeut group)and Distance Randot(DR)stereotest(control group)under different illumination conditions.Results GFRDSS could estimate stereo-acuity from 5 m,with disparity levels from 40″to 800″.Under the illumination of 100~300 cd/m^2,193 subjects(83.91%)showed fine distance stereovision(40″~60″)by GFRDSS,while 95 subjects(41.3%)by DR.The difference between them was statistically significant(Z=-9.569,P<0.05).Under the illumination of 350~600 cd/m^2,195 subjects(84.78%)showed fine distance stereo-acuity detected by GFRDSS,and the result of DR was 173 subjects(75.22%).The difference between them was still statistically significant(Z=-4.048,P<0.05).Conclusion The novel GFRDSS via eye tracking method could realize the test for 5 m-distance glasses-free stereo-acuity.Its sensitivity is proved to be higher than that of DR by results from normal young men.In addition,the interference of environmental illumination to stereotest can be effectively avoided by GFRDSS.