When I was in junior high or middle school, I was self-conscious about the way my eyes looked because they were not like a typical Korean's-- by having only one eyelid fold-- because my fellow classmates or a lot of other Korean students in classes did not have the double eye-lid folds and I've imagined what I'd look like if I had cosmetic surgery when I was old enough to do it.
Here's an example of double eye-lid surgery. The bottom one is after.
What's ironic is a lot of KPOP idols did have double eye-lid surgeries either after debut or even prior to it.
For example ~ Hyoyeon from Girls' Generation.
In her case, during the dance break close-up shots in GG's Into The New World MV, you can clearly see her natural one eyelid folds, but if you look at the later MV's, her eyes became rounder.
So, after noticing a lot of Korean celebrities in general do get double eyelid surgeries, I was grateful to be naturally born with it and decided not to get the surgery.