A Smart Mobile Application to Monitor Visual Function in Diabetic Retinopathy and Age-Related Macular Degeneration: The CLEAR Study.

PURPOSE The purpose of this study was to determine if a mobile application, the Checkup Vision Assessment System, could reliably monitor visual acuity (VA) and metamorphopsia remotely versus standard VA reference tests in the clinic. With the current COVID-19 pandemic, an even greater need for remote monitoring exists. Mobile tools enhance the ability to monitor patients virtually by enabling remote monitoring of VA and Amsler grid findings. DESIGN Prospective, multicenter reliability analysis. METHODS Participants: Patients (N = 108) with near corrected VA better than 20/200 and a diagnosis of age-related macular degeneration, diabetic retinopathy, or healthy patients without retinal disease (best-corrected visual acuity [BCVA] of 20/32 or better). INTERVENTION participants were tested using the Checkup, reference VA, and Amsler tests, with the order of testing (Checkup or reference) randomized. Patients monitored their vision using Checkup at least twice a week at home between office visits. Main outcome measurements were near corrected VA and Amsler grid test results. RESULTS Agreement was strong between Checkup and reference tests for VA (r = 0.86) and Amsler grid (sensitivity: 93%; specificity: 92%). Home versus clinic testing showed excellent agreement (r = 0.96). Patients reported successful home use. There were no serious adverse events or discontinuations. Patients rated the usability of Checkup to be excellent. CONCLUSIONS There was good agreement between Checkup and in-clinic test results for VA and Amsler grid. The low variance of Checkup testing, agreement between in-clinic and home results, and excellent usability support Checkup as a reliable method for monitoring retinal pathology in clinic and home settings.