Theoretically, one should be able to make quick work of onions tear-free if armed with a razor-sharp knife and the requisite prep skills to match, but my dry, sensitive eyes would disagree. That is, until I picked up an (admittedly goofy) tip that has made a world of difference. Instead of turning to gimmicky onion goggles or other jury-rigged setups, I rummaged through my purse for an oversize pair of sunglasses to prevent the noxious sulfurous gases that leach out of onion flesh from doing their damage. Now, it may look silly to wear sunglasses indoors, but their large size shields like magic, and I've yet to experience a mascara meltdown in the kitchen since. Have you ever resorted to this before?