How to get the perfect looking cat eye with eye liner! OMGOLLY SO SIMPLE!!! The key is in the application! After all, the cat eye is sexy, mysterious, and sultry, right? To be a master at the cat eye, simply pull out a credit card, hold it up to your eye area in the angle you want your cat eyeliner to look, and draw a line using the edge of the credit card. Couldn’t be easier!