Iowa eye exam 

Sticking your finger into someones, or your own eye knowing that it is contaminated, most likely with poo particles.

How did your son get pinkeye?
He gave himself the Iowa eye exam!

Iowa eye exam by darwyn Sobchek November 21, 2013

Iowa eye exam 

Placing a poop contaminated finger into your or someone else's eye

Kimmie totally gave herself the Iowa eye exam. Now she has wicked pinkeye!

Iowa eye exam by SlingshotSpectre November 21, 2013