Yes, reading in the sun is bad for your eyes. When you are reading in the sun, your pupil will last contracting and that leads to exhaustion of your eye muscle, distending pain of your eyeballs. It is reported that if you read books in the sun for a very long time, your eyes will become too tried to recover and at last, your eyesight will decline, your retina will be damaged and your sensitivity of vision will decline as well. All of these injuries may not be repaired any longer. What's more, when you read in the sun, you may have great chance to hurt your cornea and crystalline lens. So stop reading in the sun in the sake of your eyes. Avoiding reading in the bright light such as sunshine is your best choice. When you have outside activities in the sun, you should wear a pair of black sunglasses to protect your eyes. When your eyes feel tried, you should stop to have a break and look views outside
