Pro tip, cut your onion in a well ventilated space. Like for example crack a window over the counter that you are cutting on, it will greatly reduce the effect, and it doesn't even need to be wide open
......use Windows on an air-gapped PC to do all your software development? At least then hackers won't steal your source and post your shameful code on the internet.
I have the kitchen vent running and oh my god it does not help one bit. I think I'm especially sensitive though. I remember as a kid, my eyes would water sitting in the living room as my dad cooked in the kitchen.
Not that the fumes can't go around but there was a wall between.