The second Thursday of every October is World Sight Day, an occasion to pay extra attention to blindness and vision impairment. Perhaps one day, bionic eyes will be capable enough, and inexpensive enough, to solve most vision problems. In the meantime, remember that many eye ailments are treatable with early intervention. Take care of your eyes, and be especially kind to those with visual deficits. (After all, that could easily be you some day.)