Usability in the app Interface Designing for the Elderly with Low-Vision in Taiwan and Thailand

Changing in vision is the process of progressive disability with age. Nevertheless, the visual symptoms do restrain them from being independent. Under the concept of active aging, it is very essential to allow the elderly to maintain their independent ability in their daily living. The objective of this research is to develop an application (the app) for seniors to measure their low vision status autonomously through smart devices in their places. In this research, literature reviewing and investigation from various eyes' symptoms (such as macular degeneration, glaucoma and so on) were carried out to develop the interface mechanism that act as a simulation tool for measuring elders' visual capabilities and ocular condition. Based on these, the visual interface design with visual field simulation tools were suggested to obtain parameters for colorblind, and light and shadow control. Lastly, a prototype was developed through experiencing and interviewing both Thai and Taiwanese to gain the better understanding of the seniors' needs and usability. The results provide an alternative option for the elderly staying at home while keeping their vision health status instead of unnecessary visiting hospital in person.