Hi all! I'm born with half double eyelids. Over time, my eyelids became more apparent and about few years ago, my left eye developed triple eyelid.
Right now I have the left side triple and right side double. I know it happens and some stay temporarily but i feel the triple is staying lol.
I'm learning how to put on make-ups and the internet is not very useful when it comes to giving tips on applying eyeliner on ueven eyelids because it is quite uncommon?
Is there anyone facing the same situation? Any advice is welcome!

perhaps you can try to use double eye lid sticker , you can find it in any drugs store / cosmetic store

Hmph? Triple lids, half double lids? Pretty confusing, btw i think triple lids dont last long, i will get triple lids when i dont have enough sleep and it will go away after a few days. Triple eyelids can get uncomfortable so sometimes i will use eyelid tape to get it back to its normal shape.

And yes, i have double eyelid on my left eye and monolid on my right. It gets really annoying when i have to apply eyeliner differently to balance it out but you will get used to it.

Mine also uneven. I have to apply the eyeliner carefully. It took more time for me to apply the eyeliner and since I'm using the liquid eyeliner, it's harder. One thing about eyeliner is even I applied them so thick, when I opened my eyes, I could barely see the eyeliner. I have to draw a lil bit wing. I'm often frustrated with it. Luckily, I wear glasses so not a problem.

That happens...both our feet are not the same size, our hands too, our eyebrows are not symmetrical.

As suggested above you could use the eyelid tape.