Will the adgrunt who has not used an optical illusion as an ad for aspirins or eye drops please raise their hands? I'm afraid I can't, there was an Optrex campaign in my student folio. *hangs head*
Here's something new though, a different optical illusion used for earthquake awareness from jentera intermdia Indonesia. It's like a tsunami on paper.

agency: jentera intermdia, yogyakarta, indonesia ad: aancool cw: aancool