Autofocusing reading glasses of the future

As you age, you gradually lose the ability to refocus your eyes -- a phenomenon as old as humanity itself -- leading to a reliance on bifocals, contacts and procedures like LASIK surgery. Electrical engineer Nitish Padmanaban offers a glimpse of cutting-edge tech that's truly a sight for sore eyes: dynamic, autofocusing lenses that track your sight and adjust to what you see, both near and far.