Validation of a Portable Electronic Visual Acuity System

Mbbs Pavindran A Gounder, Mbbs Eliza Cole, Mbbs Franzco Stephen Colley, D. Hille
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引用次数: 18

Abstract

Background: The use of tablet devices and smartphones in medicine as assessment tools is becoming more widespread. These devices now run mobile applications or ‘‘apps’’ that have traditionally been the domain of desktop computers or more dedicated hardware. It is important that health professionals have confidence in the accuracy of measurements obtained from these new tools. The ‘‘EyeSnellen’’ app for the iPhone/iPad (running Apple Inc’s iOS operating system) allows users to measure visual acuity using a portable Snellen chart installed on a tablet device. Aims: To compare the visual acuity measurements obtained from EyeSnellen iPad app with a standard illuminated Snellen Chart. Methods: Participants were recruited from a tertiary level eye clinic in Western Australia. Visual acuity was measured using the Snellen light box chart and a visual acuity measurement was obtained using EyeSnellen app installed on an Apple iPad mini with the use of an Apple Iphone as a remote that was connected via Bluetooth. Results: 122 eyes were tested. Bland-Altman analysis revealed a mean difference of 0.001 logMAR units between the visual acuity measurements obtained from EyeSnellen app and those taken on the light box chart with 95% limits of agreement of 0.169 to 0.171. Conclusion: The Snellen Chart function on EyeSnellen app is equivalent to the traditional Snellen chart at measuring visual acuity at a test distance of 6 metres.
便携式电子视力系统的验证
背景:在医学中使用平板设备和智能手机作为评估工具正变得越来越普遍。这些设备现在运行移动应用程序或“应用程序”,这些应用程序传统上属于台式电脑或更专用的硬件领域。重要的是,卫生专业人员对从这些新工具获得的测量结果的准确性有信心。用于iPhone/iPad(运行苹果公司的iOS操作系统)的“EyeSnellen”应用程序允许用户使用安装在平板设备上的便携式Snellen表来测量视力。目的:比较eyeesnellen iPad应用程序与标准照明Snellen表的视力测量结果。方法:参与者从西澳大利亚州的一家三级眼科诊所招募。使用Snellen灯箱表测量视力,使用安装在Apple iPad mini上的EyeSnellen应用程序测量视力,使用Apple Iphone作为通过蓝牙连接的遥控器。结果:共检查122只眼。Bland-Altman分析显示,eyeesnellen应用程序获得的视力测量值与灯箱图上的测量值之间的平均差异为0.001 logMAR单位,95%的一致性限为0.169至0.171。结论:eyeesnellen app上的Snellen表功能与传统的Snellen表在测试距离为6米时测量视力的效果相当。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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