How do I prevent my eyes from watering when cutting onions?

The most reliable tip is to make sure that the airflow is away from your face. One way of achieving this is to light a candle and place it on the side opposite to where you are chopping. This creates an updraught which draws the onion fumes away from you. Another tip which seems to work, though I can't explain why is to chew some parsley. I wear specs, so I rarely have problems chopping onions.

There is only one thing that works. Place the onions in the refrigerators during a couple of hours before cutting.

use a food processor.

I try to keep my head up away from the onions and wash my hands as soon as I finish but it doesn't always work. There are some good tips in the comments.

I hear people say you can soak them in salt first for a few minutes

Just don't against the direction of the air when you cut onions. Cmiiw ??

I used to store mine in the fridge before use. If they are kept cold it's easier when chopping on the eyes.

Wear swimming goggles so you don't feel pain.

It helps if you do it under water.

Ask someone else to cut for you. I guess dipping it in water for few minutes after peeling it will help.

You get someone else to cut them up for you... Fill your sink halfway with water and slice as much as you can while the onions are underwater. That keeps the juice from reaching your eyes. (The root end of the onion is where most of the liquid that stings the eyes is. You can cut the rest of the onion out of water if you remember to cut the root end under water and usually have little or no problem with stinging eyes.)

Wear spectacles may be.

Ask someone else to do for you

I don't like to cut onions,so thanks to my mom who do it for me.

If you keep the tap running that will help you