I wrote a book about eye health called The Eye Diet . It kept me from needing to switch to the nightmare of trifocals. But almost no one has read it. So I decided to make a short, simple summary for a busy world. The book has all the research, but here are a few of the things I found. One, eye sight is not a one way downhill slide . We lose most of our eyesight during our teens, and then during our perimenopausal years (sorry guys, our hormones change too). Otherwise, sight tends to be pretty constant. Two, ten hours a day of screen time does permanently affect sight . We are seeing a pandemic of extreme nearsightedness that promises to enormously increase legal blindness across the globe. And three, the good news, there are simple things you can do to help your eyesight . Get outside . Use natural light to read by. Get your children outside. We do not have artificial light that can match the sun. If you are having trouble reading, practice us...