First he lost the use of his hands, so he learned to draw with his feet; when that was taken away, he promised to learn how to rig up a computer so he could draw with his eyes. Well, Francis' sister emailed us today to let us know these experiments have been a success.
The pictures you're seeing here were drawn by Francis using only his eyeballs. Using Tobii's "eye-gazing" technology, plugged into drawing programs Sketchup and GIMP, Tsai has been able to create these four images using nothing but the motion of his eyeballs. I'm at a loss for words.
You can purchase prints of these from Francis' store, with all proceeds going towards funding his medical care.