I found that doing this before they're cut up helps to save a lot of tears & greatly reduces the acidity that get in the eyes! I was at my nephew's house one Thanksgiving & his wife had asked me to cut up some onions & green peppers for the stuffing. I decided to put the onions in some cold water after they were peeled. When I was ready to chop them up, I noticed that there was no acidic juices released from them!! I had stopped them cold!! Thjis was a great trick. Been doing it that way ever since!