Students at the University of Waterloo have created a system to help make touchscreens accessible to the visually impaired: https://www.design-engineering.com/waterloo-students-create-a-system-to-help-visually-impaired-using-touchscreens-1004031377/
Twitter:
Helping Make Touchscreens Accessible for the Visually Impaired: https://bit.ly/2QdggR8