These products exists since the 80s. I have never seen one that is actually practical in real life. The elevator-pitch always sounds nice, to sighted people at least..

Please don't fall for this patronising attitude that just because you are a tech person, you can invent all sorts of helpful gadgets.

Educate yourself about the disability before giving advice or your great $0.02 ideas. They are always ment in a good way, but tiring for those who are in the know.