PDF(Pubmed)
Abstract：
This study aimed to discover distance visual acuity (VA) assessments through the display of the Snellen chart on the iPad tablet. The findings are equivalent to those obtained using the conventional light-box Snellen chart. In this work, the Snellen iPad app and Eye Chart HD iOS app are utilized among the participants in the Ophthalmology Outpatient Department (OPD) for determining VA. A cross-sectional method was used for the examination, which included 100 new patients who were chosen by random selection. The age requirement for new patients was 8 years and up for both genders. Patients with a VA of less than 6/30 were disqualified from the experiment. Two testing modalities are used to measure VA, such as the iPad Mini 2 with the iOS software Eye Chart HD and the classic Snellen light-box chart. The observation revealed that the Snellen iPad app and the classic light-box Snellen chart produced equivalent findings. The classic Snellen chart may have been memorized by participants before their eye examination, undermining the accuracy of the conclusions of the initial testing modality used. Patient-related variables were also identified as confounders. Future studies should adjust the brightness of the iPad Mini 2 and the traditional light-box Snellen chart to make sure that neither experiment modality\'s brightness affects the accuracy of the findings. Future research should also investigate the use of premium apps, use both devices, and employ a bigger sample size.
摘要：
这项研究旨在通过在iPad平板电脑上显示Snellen图表来发现远距视力（VA）评估。这些发现与使用传统的光箱Snellen图表获得的结果相同。在这项工作中,眼科门诊(OPD)的参与者使用SnelleniPad应用程序和EyeChartHDiOS应用程序来确定VA.采用横截面法进行检查，其中包括通过随机选择选择的100名新患者。新患者的年龄要求为8岁及以上。VA小于6/30的患者不符合实验资格。两种测试方式用于测量VA，例如iPadMini2，带有iOS软件EyeChartHD和经典的Snellen灯箱图表。观察显示，SnelleniPad应用程序和经典的灯箱Snellen图表产生了相同的发现。经典的Snellen图表可能已经被参与者在眼睛检查之前记住了，破坏了所使用的初始测试方式的结论的准确性。患者相关变量也被确定为混杂因素。未来的研究应该调整iPadMini2和传统灯箱Snellen图表的亮度，以确保任何实验模式的亮度都不会影响结果的准确性。未来的研究还应该调查高级应用程序的使用情况，使用这两种设备，并采用更大的样本量。
