Using your finger to follow along with printed text is a method many people use to keep track of what they are reading. The FingerReader, a prototype from MIT’s Fluid Interfaces Group, incorporates a camera into a ring to follow the finger and announce the printed text. While still a prototype, the following video shows how this can make reading easier for people with low vision, dyslexic, or other print disabilities.

FingerReader – Wearable Text-Reading Device from Fluid Interfaces on Vimeo.

While watching this video, I noticed the user had a patch of fingernail polish on her thumb. This led me to think that Google Glass, or similar head based unit could probably track a marked finger and do the same tracking and word prediction. This would be similar to  head tracking units for onscreen keyboards.