Blinded by the night
Poor night vision is the result of changes in the pupil, lens, and retina. Does eating carrots help? Probably not for well-nourished Americans.
It's been said that the eyes are the windows to the soul. At a more mundane level, they also say a lot about how old we are. With advancing years, we're prone to a number of serious — and less-serious (but bothersome) — conditions of the eye.