Assistive Technologies Based on Laser Scanning to the Eye
![Head mounted display.](http://depts.washington.edu/hplab/wordpress/wp-content/uploads/2014/11/assistive-e1415081070142-300x249.png)
The Wearable Low Vision Aid (WLVA) is a portable system that uses machine vision to track potential walking hazards for the visually impaired. A scanning fiber display couples a laser diode to a vibrating optical fiber that projects a virtual image onto the retina to display warning icons that the visually impaired can recognize.