2.2 billion people live with vision impairment: Over 1 billion of these cases are, or were, preventable/treatable. Most of these individuals live in low income Countries, where access to care can be limited. Why do people still go blind from preventable conditions? In order to treat, first, you need to be able to diagnose. The first step to prevent these conditions is to make diagnostic technology available, accessible, and affordable. This project is to assess the usability and feasibility of portable vision health screening in a clinical environment.