This project aimed to recreate an improved version of The EyeWriter, a device designed to allow graffiti artists and designers with ALS to draw with their eye movement. A video of the original device is here:

I was impressed that someone was able to design and manufacture something so complicated using an Arduino, providing an opportunity for patients to continue their work after becoming disabled.

The link to a detailed description of EyeWriter 2.0 is here:

http://www.instructables.com/id/The-EyeWriter-20/