Wearable button eyes

A minimum effort Halloween costume - The Other You. As seen in the movie Coraline.
The button eyes can be either held with your eye socket muscles somewhat comfortably, or attached with double-sided tape. You can blink with them and you can see through the holes. there is a cavity on the other side that makes for a close but somewhat comfortable fit, in comparison with flat buttons. You can also wear your glasses over the buttons.
You will also need some string to make them look sewn-on.