When applying your liner, no matter what eye shape you have, Chinchilla recommended staying right along the lash line and building it up from there. "When you get toward the end of the eye, you always want to start going upward," said Chinchilla. "The way [people] mess up is they follow the curve of their eye and bring the liner down."
This can be best described as making a roller coaster with your liner. "The last thing you want to do is droop your eye," said Chinchilla. When in doubt, just keep the line straight and moving upward.
Image Source: Courtesy of KVD Vegan Beauty