(Telegraph) The real reason your eyes go red after swimming isn’t chlorine, but urine
Think your red eyes at the pool are caused by chlorine? Think again
Contaminants in the pool, including urine and sweat, bind to the chlorine in the water creating a chemical compound which in turn causes eyes to sting.
The problem may be worse in indoor swimming pools where there is a poor air turnover, resulting in these contaminants accumulating in the air.