Give your gizmo the gift of sight
Due to my need to develop some form of eyegaze mouse we have been (wife & I) using ardueye as an embedded first stage. Here is where we have got so far.
1) Hooked up camera at close to correct focal lenght to eye
2) Established that the eye will track left and right and display in some form that we can use.
3) Worked out the drift in the system focusing on the eyeball (similar to a gyro drift).
We have success in the above three.
By just tracking one axis and not using accumulation we could work out the drift so the next step is to get a mega and repeat for two axis and either use the servo out, in arduino or send serial commands to a teensy board which has usb mouse routines on it.