Inventions on GUI for Eye Cursor Controls Systems
  Operating a GUI through eyeball is a complex mechanism and not used as often as mouse or trackball. But there are situations where eye-mouse devices can play a tremendous role especially where the hands of the user are not available or busy to perform other activities. The difficulties of implementing an eye-cursor control system are many. The article illustrates some inventions on eye-cursor control system, which attempt to eliminate the difficulties of the prior art mechanisms. 
Umakant Mishra
cs.HC