A visual acuity (VA) testing application for the iPad® (Apple, Cupertino, CA) tablet computer using the mirroring technique was developed that randomly presented letters categorized by cognoscibility. The aim of this study was to assess whether measurements of distance VA using this application were in agreement with existing standard clinical tests of VA in adults with normal vision.Forty-three normally sighted subjects were tested using the Early Treatment of Diabetic Retinopathy Study (ETDRS) chart. The log minutes of arc (logMAR) VA results were compared with those from the iPad-based application, which contains a Snellen chart, a Tumbling E chart, a Landolt C chart, and a VA chart consisting of Arabic figures. After a 10-min break, subjects were retested with each test in the same order. Agreement was assessed by determining the 95

作者：Soolienah, Rhiu；Hye Jin, Lee；Yong Sook, Goo；Kyoungrok, Cho；Jae-Hyung, Kim

来源：Telemedicine journal and e-health : the official journal of the American Telemedicine Association 2016 年 22卷 3期