Eyeworm 

A picture or image that gets stuck in your head.

An image that you can't forget.

That weird sticker I keep seeing everywhere is an eyeworm!

Eyeworm by Calabar Swelling March 29, 2010

eyeworm 

An image that sticks in your mind, and will not leave no matter how much you try. (This is the visual analog of earworm.)

An Internet Fable: Sam's most memorable eyeworm occurred when he stumbled across the Two Girls, One Cup video. Try as he might, he could not get the image out of his head.

Moral: What has been seen cannot be unseen.

eyeworm by The Real Dr. Strange January 15, 2011