Swimming is great exercise. Swimming pools contain many chemicals and potential contaminants. Chlorine and other chemicals are added to pool water to control bacteria, while these chemicals also can irritate the eyes. Eye infections and inflammations are widespread among swimmers. So as a swimmer, you can do as following: 1) be careful, when swimming in public pools. Do not swim in a pool with leaf litter. Avoid swimming with large numbers of people. Stay out of swimming pools with small children. Wash before entering the water. Do not change diapers in swimming pools. 2) you can buy goggles for swimming. And you should make sure to keep them for a while. Do not touch the eyes before washing hands with soap. And then clean eyes with drops after swimming. 3)Slow the spread of eye infections with basic precautions. Eye infections, such as pink eye (conjunctivitis), can be transmitted through close contact with an afflicted individual. Stay home. Do not go to swimming pools or other public places if you have an eye infection.