One of my DSs has returned to college to become a respiratory therapist. He has been working with ventilator dependent patients. One such gentleman has ALS, the same disease that has incapacitated Stephen Hawking and claimed Lou Gherig, the baseball player. This one particular patient can only move his eyes at this point in his life yet he loves to converse. It takes him some time to construct a sentence but even questions that he could answer with a monosylable, he answers with full, complete sentences. His voice is synthesized through the computer so you actually hear a speaking, male voice. My DS is so impressed with this man's courage and tenacity and his upbeat spirit. He told me that to see ERICA in action is truly amazing. If the patient is moved, the camera moves back and recalibrates but it is always focused on his eyes. Here is a link to the product. What amazed me was the cost. For what it does, it is modestly priced.
http://www.axistive.com/erica-eye-tracking.html
http://www.axistive.com/erica-eye-tracking.html
The newly released ERICA computer control system gives users complete control over their computer system solely by using their eye. It enables succesful use of "eye-gaze" and "eye-tracking" as computer control. The system takes under half an hour to install and prepare and can then be used to type and perform other functions successfully.
Initially, the firewire camera is aimed and directed on five spots on the screen - one spot for the focus, and others for four corners. Erected on a tablet PC, the system has full touch-screen capabilities built-in. This makes the system ideal for ALS and for other degenerative issues.
Available for more than $20,000 USD a few years ago, this level of technology is currently available for $7,000 USD.