I love onions.  Tears and irritated eyes, not so much.  To the rescue:  onion goggles!  Every vegan, vegetarian or any kind of cook should own a pair.  My faves are the RSVP Tearless Kitchen Onion Googles (about $18 on Amazon). Once you put them on, foam prevents those tear-causing vapors from reaching your eyes.  You can breathe deeply and fear not.  So you look a little silly--who cares?  You will be able to chop onions with abandon.