Edit: Swim goggles should work too if you don’t have to worry about glasses.


I know this will be obvious to some, but I’ve never seen anyone in my family wear them. It’s so obvious once you think about it, and yet I’d wager most people (especially ones who don’t cook as a hobby) have never tried this.

The reason you cry is because slicing onions produces an organosulfur called syn-Propanethial-S-oxide. Lab goggles – as designed – keep the chemical irritant from reaching your eyes. I’ve used them hundreds of times now, and I think there was one time it got into my eyes when I didn’t have the goggles situated right (not difficult; I was just being a moron).

My 3M anti-fog pair were about $5 USD when I got them, and it looks like they’re about $7.50 USD now. For that price, I never have to dread cutting up onions again. It’s not magic; it’s just basic PPE, and it works. You can even wear them over eyeglasses (I’m sure some huge, circular frames won’t fit, but most should).

Even if you forget them and remember them midway through slicing, it can still help somewhat. So even if you’re as absent-minded as I am, you can benefit from trying this.

These (below) were the ones I got personally, but feel free to try what you already have if you already have a pair on-hand for e.g. cleaning. I’d assume the important thing is just that they’re goggles, not glasses.

A pair of 3M 334 Series Splash Safety Goggles


Why YSK: owie, oof, ouchie, my eyes. Cooking is just DIY organic chemistry.

  • DredPyr8Roberts@lemmy.world
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    3 months ago

    Use a sharp knife because a duller knife is less safe, and it does more smashing than cutting which casues more fumes.

    Don’t put your head over the onions as you work. Take a half step back and extend your arms more so you’re further away from the fumes.

    If your kitchen is not well ventilated, put your cutting board on the stove and turn on the hood.

    • brap@lemmy.world
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      3 months ago

      Don’t cut the root off either. Use it to hold the onion together and in my experience also seems to lessen the effect on my eyes.

        • lightnsfw@reddthat.com
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          3 months ago

          I cut it in half and slice off a much as I need then put the rest in a snapware in the fridge. Eventually it all gets used. I’ve had onions last for weeks doing this. No crying either.

          • sem@piefed.blahaj.zone
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            3 months ago

            That makes sense, and is what I do. I would call this “cut off the root last” instead of “don’t cut off the root.”

            For me the biggest factor is the age of the onion, which can be quite aged before it reaches you the consumer, especially with recovered produce.

  • BedSharkPal@lemmy.ca
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    3 months ago

    How soft do you have to be to cry over cutting an onion? Like, they can’t even feel it so just chill.

    • MIDItheKID@lemmy.world
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      3 months ago

      “Onions make me sad, a lot of people don’t realize that. When I’m cutting onions, I’m sad. Because the plight of onions, it’s sad. But people don’t realize I’m actually crying - they think I’m just reacting.”

      Mitch Hedberg

    • TheTechnician27@lemmy.worldOP
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      3 months ago

      We vegans kind of slide everything over, so slaughtering animals becomes unthinkable, and butchering vegetables becomes sad.

  • scarabic@lemmy.world
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    3 months ago

    Everyone should own some eye protection. A quality respirator is also extremely useful and very wise to have around in many circumstances.

    • Appoxo@lemmy.dbzer0.com
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      3 months ago

      Let’s pull out the breathing mask one uses for spray paint and invite someone over for dinner /s and /j

  • Tomtits@lemmy.dbzer0.com
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    3 months ago

    The vapour released is attached to the moisture in your eyes so just stick your tongue out for the duration of the onion cutting and you’ll be reet

  • systemglitch@lemmy.world
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    3 months ago

    I don’t consider onion tears a problem. It’s an experience I would not want removed from my life, as it is one of those things letting me feel the nuance of being alive.

    Red onions bring the most tears here, and yellow the least. I never notice yellow being an issuez but reds will make me take a step back sometimes to blot my eyes with something lol

    I can’t relate to that dread part at all. If I knew it was harmful to my eyes I would reconsider this stance, but otherwise, yeah, I’m glad for the pain it causes.

  • Contramuffin@lemmy.world
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    3 months ago

    Cut vertically (with the veins). You basically get no stinging that way (until you start cutting horizontally)

  • rekabis@lemmy.ca
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    2 months ago

    If you cut onions with a knife, sure. I use a Japanese mandolin called Benriner that is so sharp that I can get through several yellow onions before I start having issues.

    • mrgoosmoos@lemmy.ca
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      3 months ago

      yep. I just blow it into the living or dining room. easier for half a dozen people to deal with it than just myself

      • Jarix@lemmy.world
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        3 months ago

        Literally never had that happen. And it’s often more than half a dozen people in the room the fan faces. Concentration of it is too diluted by the air from the fan or something. Not sure why it doesn’t have the effect but I’ve never had a problem in that regard.

        Seems like it might make sense but is not my experience, anecdotal evidence being what it is

  • neidu3@sh.itjust.works
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    3 months ago

    I just cut the onions on the stove with the ventilator running. It allows me to slice/dice/mince the onions however which way I want without any tears.

    • mrgoosmoos@lemmy.ca
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      3 months ago

      as a kid I developed a resistance working in a kitchen

      as an adult it somewhat continued due to onions being an important part of every meal

      but sometimes you just get one of those fuckers that’s so goddamn juicy that the mere sight of it brings you to tears

    • TheTechnician27@lemmy.worldOP
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      3 months ago

      I think so?? Some of it depends, I think, on the variety of onion (e.g. I’ve always found sweet onions to be gentler compared to white onions). I don’t always cry without them per se, but it still feels noxious.

      • M137@lemmy.world
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        3 months ago

        Sharpness of your knife, time spent cutting, how close your face is to it and I’m pretty sure just biological differences all play part.
        I used to “cry” more from it when I was a teenager because my mom had shitty knives and I was just worse at cutting them so it took more time and I was shorter (obviously).
        Now I only have any issues at all at home when I’m sitting down, which I sometimes have to due to bad knee and back.
        And almost always get it pretty bad when I’m cooking with/for my mom and other family members at her place as she only has serrated knives, which makes it a lot worse, but she refuses to have anything else.

    • bluegreenpurplepink@lemmy.world
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      3 months ago

      Onions don’t bother me either. I used to volunteer to cut them doing prep work so my co-workers didn’t have to cry. I think we’re just lucky. I guess it’s our lame superpower.