Principal Findings
In this study, we compared the performance of paper- and app-based J-OSDI through data collected from a DED mHealth app (DryEyeRhythm) to evaluate their equivalency for subjective symptom questionnaires. The app-based J-OSDI total score was comparable to its paper-based counterpart. The recent COVID-19 pandemic limited health care visits worldwide; therefore, efforts to improve telehealth and produce noncontact medical devices are escalating [The app- and paper-based versions of the J-OSDI yielded comparable results, suggesting satisfactory performance of the app-based OSDI as a substitute for the counterpart platform. Subjective DED symptoms can be highly variable and nuanced [The app-based J-OSDI demonstrated satisfactory internal consistency, and a comparison of the 2 platforms of J-OSDI indicated high agreement and positive correlation. Notably, the Cronbach α obtained in this study was higher than that obtained in a previous study on the reliability of the paper-based J-OSDI [