Bhaskaran Aparna, Babu Mahesh, Abhilash B, Sudhakar N A, Dixitha V
Department of Ophthalmology, KVG Medical College and Hospital, Sullia, Karnataka, India.
Taiwan J Ophthalmol. 2022 May 13;12(2):155-163. doi: 10.4103/tjo.tjo_7_22. eCollection 2022 Apr-Jun.
The aim of this study was to compare the visual acuity (VA) by smartphone-based applications - EyeChart and the Peek Acuity to the standard Snellen chart to explore the possibility of using them as an alternative in tele-ophthalmology in the current COVID-19 pandemic.
An analytical type of observational study was done on 360 eyes of 184 patients above 18 years of age. Patients with VA <6/60 and gross ocular pathology were excluded from the study. VA measured by these three methods was converted to logMAR scale for ease of statistical analysis. One-way analysis of variance with post Tukey HSD was used to compare the VA measured by these three methods.
There was no statistically significant difference between VA measured using the smartphone-based apps (EyeChart and Peek Acuity) and the Snellen chart ( = 2.5411, = 0.7925) in 360 eyes assessed. VA measured by Peek Acuity ( = 0.5225) was more comparable to Snellen chart than EyeChart ( = 0.4730). Intraclass correlation coefficient (ICC) demonstrated a strong positive correlation for EyeChart (ICC: 0.982, < 0.001) and Peek Acuity (ICC: 0.980, < 0.001) with Snellen chart. A Bland-Altman difference plot showed good limits of agreement for both EyeChart and Peek Acuity with Snellen chart. In subgroup analysis, VA measured by Peek Acuity was not statistically different from Snellen in any subgroups, but in EyeChart, it was statistically different in emmetropes.
VA measured by smartphone apps (EyeChart and Peek Acuity) was comparable with traditional Snellen chart and can be used as an effective, reliable, and feasible alternative to assess VA in tele-ophthalmology.
本研究旨在比较基于智能手机的应用程序（EyeChart和Peek Acuity）与标准斯内伦视力表的视力，以探讨在当前新冠疫情期间将它们用作远程眼科替代方法的可能性。
对184例18岁以上患者的360只眼睛进行了分析性观察研究。视力<6/60及有明显眼部病变的患者被排除在研究之外。为便于统计分析，将这三种方法测得的视力转换为logMAR尺度。采用单因素方差分析及Tukey HSD事后检验来比较这三种方法测得的视力。
在评估的360只眼中，使用基于智能手机的应用程序（EyeChart和Peek Acuity）与斯内伦视力表测得的视力之间无统计学显著差异（F = 2.5411，P = 0.7925）。Peek Acuity测得的视力（P = 0.5225）比EyeChart（P = 0.4730）与斯内伦视力表更具可比性。组内相关系数（ICC）显示EyeChart（ICC：0.982，P < 0.001）和Peek Acuity（ICC：0.980，P < 0.001）与斯内伦视力表呈强正相关。Bland-Altman差异图显示EyeChart和Peek Acuity与斯内伦视力表均具有良好的一致性界限。在亚组分析中，Peek Acuity测得的视力在任何亚组中与斯内伦视力表相比均无统计学差异，但在EyeChart中，正视眼亚组有统计学差异。
通过智能手机应用程序（EyeChart和Peek Acuity）测得的视力与传统斯内伦视力表相当，可作为远程眼科中评估视力的有效、可靠且可行的替代方法。
