Some great news: Today's New York Times has a piece on Dr. Stephen Kurtin and his work on developing the TruFocals eyeglasses, whose lens can be adjusted to allow better focus for people who suffer from presbyopia. You can read the story here.
Related link: http://trufocals.com/About-Us
Hey Ed, I saw this article too and was pretty impressed with the idea. To me the next logical step would be to have the glasses detect distance somehow and adjust focus on-the-fly.
It's a great idea to have eyeglasses that can adjust to fit the needs of people who have eye disabilities. I wonder when they'll hit the market