Avoid Unnecessary Tears
When cut, onions release a chemical irritant into the air. This irritant will draw out tears from the eyes of even the most strong-willed humans. If you want to avoid shedding tears while cutting onions, you can do what most people do by cutting it in a direction away from your face. Or you can use this simple and more effective hack.
Leave the onions in the freezer for about 15 minutes. The low temperature will freeze the onion’s enzymes, reducing the amount of irritant released into the air. This will hugely reduce your likelihood of crying while cutting the onion.