动态视力评估软件DVA-Ⅰ的推介和初步临床应用

The introduction of dynamic visual acuity assessing software DVA-Ⅰ and the study of its clinical application

目的介绍新开发的动态视力评估软件DVA-Ⅰ,并进行初步临床应用研究。方法设计符合动态视力检测要求的评估软件,并选取37例受试者参加临床试验性测量,通过DVA-Ⅰ软件呈现大小分别为9pt及6pt的旋转视标,测量受试者在1m远处所能分辨的视标最大转速及识别速度。结果软件运行结果稳定。所有受试者可分辨的9pt视标转速高于6pt视标[(131.76±17.37)r/min vs(115.54±37.73)r/min,P=0.005],9pt视标辨认时间少于6pt视标[(15.35±12.16)svs(23.77±13.41)s,P=0.000]。不同性别及不同屈光状态组间可辨认的动态视标最大转速及辨识速度的差异均无统计学意义(P>0.05)。结论DVA-Ⅰ型动态视力评估软件可准确测量受试者的动态视觉分辨能力及分辨速度,并可通过有效控制环境因素减小对测量结果的影响,是一项具有临床应用前景的运动视觉辅助设备。

Objective To introduce a new software DVA-Ⅰ and to approve its clinical feasibility in dynamic visual acuity assessing. Methods A specific software for DVA testing and recording was developed. Thirty-seven subjects were examined one meter away from the DVA facility. The DVA-Ⅰ system presented 9 pt and 6 pt size targets respectively in the maximum rotary velocity and recorded the time cost of identification from the subjects. Results The DVA-Ⅰ ran smoothly and friendly. All of the subjects showed easier and quicker identification when reading 9 pt targets than that in 6 pt targets [（131.76±17.37）r/min vs （115.54±37.73）r/min, P=0.005, （15.35±12.16）s vs （23.77±13.41）s, P=0.000]. However, there were no significant differences between male and female subjects, neither between emmetropes and myopes （P〉0.05）. Conclusion DVA-Ⅰ system has the capability of detecting dynamic high speed rotated targets and accurate time cost for identification. Meanwhile it effectively controls the external noise factors around DVA testing. It will provide a helpful sports vision assessment in clinic.