[matt_the_bass]

Also out onions in the freezer for 10-15 minutes before cutting if they make your eyes tear. The cold reduces this effect.

[vram22]

I've heard that cutting them under water helps for that. I don't do it myself because I think (unscientifically) that the tearing they cause might be good to clean out the eyes of any gunk - particularly if living in an area with dust.