User-Centered Design and Usability Study of Android-Based Vision Screening Tools: The Quick Check Application

Abstract

Abstract The availability of smartphones with increased computing capabilities has opened new doors for researchers and medical practitioners to reach out to patients. Usability remains a crucial factor in using mobile applications that support patient-healthcare provider interactions. The use of mHealth, a medical practice supported by mobile devices, is now being used to assess and monitor conditions such as autism, dementia, and Parkinson’s disease. A series of applications being developed by the EYE Center for Children's Vision Learning and Technology. This is a University of Washington Bothell non-profit organization dedicated to the research, development, and communication about technologies to assess and treat functional vision problems that impact learning. A new vision screening Android-based mobile app, QuickCheck (used to screen for vision-related problems such as near and distance visual acuity, amblyopia, and convergence insufficiency) is being developed by the group and is the focus of this research. A usability framework, considerations and recommendations regarding the use of a mobile device as a clinical assessment tool, is provided. Five users participated in the usability study and we used System and software quality models ISO/IEC 25010–1, 2011 and Usability Definitions and concepts, ISO 9241–11 Guidance on usability, 2018 standard to define objective measurement of QuickCheck app. MARS(Mobile App Rating Scale) questionnaire, interview and user observations have used to measure users overall satisfaction with the app. The results of the usability test for the QuickCheck app demonstrated that overall quality of the app meets the general acceptance criteria for the identified functional and non-functional requirement. However, several areas of concern and improvement are also noted such as task flow, improvements in CISS questions and time required to complete the CISS test. Qualitative findings include the need for feedback to users, help instructions format. Further recommendations for full-scale clinical testing are provided.