it's very bad. so don't be silly and stop putting water in your eyes. Water alone is irritating to the eye. Tears are composed of water and salt, however you cannot put saline into your eyes as well, because is not in the right proportion.Ordinary water contains parasites and bacteria which is very likely to cause serious infection of your eyes. If your eyes feel tired and sore, try artificial tears from the drugstore. Better yet, have an eye exam to find out why your eyes are sore. The water you get out of your pipes are chemically treated to make it safe to bath and drink and cook, but your eyes are so much more sensitive then your skin or stomach.So do not ever put water in your eyes.