This was an image from Seiko Mikami's ARTLAB Project "Molecular Informatics" is an interesting way to use Eye-Tracking to navigate through a 3D space of the user/wearer's making...
"Eye Music" another interesting use of Eye-Tracking to create music based on the path the user takes when gazing at a piece of art. Below are some images from the site:

Sketch of a person using the installation.

"Eye Path of Girl A"

"Eye Path of Girl B"