A spoon.
Yes apparently, a spoon is the key to perfecting your eyeshadow, particularly the cut-crease technique.
Beauty blogger Brittney Foley uploaded an Instagram video, explaining the idea, and it looks relatively easy to manage.
Cover your eye with a spoon, blend your eyeshadow over it and the result is a perfectly defined crease.
If you find that your eyeshadow has a tendency to blend together, regardless of how many different shades you apply, this might be the key to defining your peepers.
YES.