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submitted 1 week ago* (last edited 1 week ago) by TheTechnician27@lemmy.world to c/youshouldknow@lemmy.world

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.

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[-] DredPyr8Roberts@lemmy.world 7 points 1 week 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 3 points 1 week 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.

[-] sem@piefed.blahaj.zone 1 points 1 week ago

You waste so much onion that way though

[-] TheTechnician27@lemmy.world 2 points 1 week ago* (last edited 1 week ago)

This is true. (re: droplets; study also rejects the popular chilling method). People in my experience don't understand how much safer a sharp knife is until you put one in their hands and get them to just try it.

Otherwise, though, the "fume hood" approach seems extremely excessive when a cheap, comfortable, unobstructive pair of goggles is likely to work more consistently and with less thought. I merrily chop with my cutting board wherever I want and standing however I want.

A sharp knife is something you should be using regardless, but these other methods like meticulous posture, fume hoods, pre-soaking, etc. all seem more convoluted and varying degrees of less effective than grabbing some goggles from a drawer and putting them on your face.

[-] BedSharkPal@lemmy.ca 4 points 1 week ago

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

[-] TheTechnician27@lemmy.world 2 points 1 week ago* (last edited 1 week ago)

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

[-] islandcoda42@lemmy.zip 3 points 1 week ago
[-] TheTechnician27@lemmy.world 0 points 1 week ago* (last edited 1 week ago)

You know what? If that carrot were in the wild, it'd be way worse off. Imagine being gnawed on for hours by a rabbit; I'm giving it a quick, painless(TM) death. You moralizing nihilivores are obnoxious.

[-] blazeknave@lemmy.world 2 points 1 week ago

COVID masking worked too

[-] scarabic@lemmy.world 2 points 1 week ago

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

[-] PoastRotato@lemmy.world 2 points 1 week ago

Tried this with a pair of swim goggles once. Worked with the onions, but got clowned so hard by my roommates I cried anyway 😭

[-] homes@piefed.world 2 points 1 week ago

is it weird that I don't really have this problem?

[-] bluegreenpurplepink@lemmy.world 1 points 1 week 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.

[-] Anon518@sh.itjust.works 2 points 1 week ago

I lift weights and have sex with girls. Works for me.

[-] rob_t_firefly@lemmy.world 3 points 1 week ago

Congratulations on adding three pushups to your weightlifting regimen.

[-] melfie@lemmy.zip 1 points 1 week ago

I just refrigerate my onions and don’t seem to have any issues.

[-] middlemanSI@lemmy.world 1 points 1 week ago

You can also just add water. Cut them wet.

[-] TheTechnician27@lemmy.world 1 points 1 week ago* (last edited 1 week ago)

Presoaking and making the cut slightly more dangerous seems like a silly solution when you have a pair of goggles in a drawer unless you're waiting for your soon-to-be-only pair of goggles in the mail. Especially because all you're likely to be doing is kind of watering down the droplets, making it less bad.

[-] middlemanSI@lemmy.world 1 points 1 week ago

I think by adding H2O you eliminate most of the vapour..I think. It works.

[-] 46_and_2@lemmy.world 0 points 1 week ago

It absolutely works if you just wash them beforehand (not soak), or when you've cut them in half/quarters.

[-] middlemanSI@lemmy.world 0 points 1 week ago
[-] 46_and_2@lemmy.world 1 points 1 week ago

And I'm confirming 😉

[-] corvi@lemmy.zip 1 points 1 week ago

Sharpening your knife will help, too. Crushing the onion with your chef’s spoon releases way more of the cry gas.

[-] systemglitch@lemmy.world 1 points 1 week ago* (last edited 1 week 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.

[-] dream_weasel@sh.itjust.works 1 points 1 week ago

Keeping your knives wicked sharp also helps a lot.

Or, y'know, you could just harden the fuck up.

[-] blimthepixie@lemmy.dbzer0.com 1 points 1 week 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

[-] irelephant@lemmy.dbzer0.com 1 points 1 week ago

You could also sharpen your knives and cut them properly.

[-] rekabis@lemmy.ca 1 points 1 week 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.

[-] lemmyng@lemmy.world 1 points 1 week ago

Funny enough, I learned this from Pokémon Journeys of all things.

Source: The episode where Goh catches Sobble, Ash and Goh remember Mimey wearing goggles while cutting onions, which is how they manage to stop Team Rocket from capturing it.

[-] Asetru@feddit.org 1 points 1 week ago

My dad always sliced onions wearing diving goggles. Always said he might look stupid but it works.

[-] TheTechnician27@lemmy.world 1 points 1 week ago

Oh, with a denim apron and lab goggles, I look like a bootleg Jesse Pinkman. But that kind of makes things a bit more fun in its own way.

[-] Drasglaf@sopuli.xyz 1 points 1 week ago
[-] yesman@lemmy.world 0 points 1 week ago

Swim goggles are better at making a seal, and are more covenant to throw in a drawer or something.

[-] TheTechnician27@lemmy.world 1 points 1 week ago* (last edited 1 week ago)

Yeah, I mention those at the top, but doesn't work for people who need/want to wear glasses. Plus, at least to me, putting on swim goggles dry pulls on my hair and is uncomfortable. Lab goggles are the more generalized – and arguably comfortable – solution, and realistically, there's no issue with the lab goggles' seal (the mistake I made one time was because I was being an idiot and wouldn't have been prevented by swim goggles).

[-] sem@piefed.blahaj.zone 1 points 1 week ago

I also use lab goggles to cut onions (former stem majors, unite!) Swim goggles are way less comfortable and useable.

I cook with a lot of produce diverted from waste streams -- perfectly fine to eat but not the prettiest. Sometimes some old onions get in the mix too, and those are the ones that get really sulfury.

this post was submitted on 12 Apr 2026
34 points (97.2% liked)

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