Are your eyes fine-tuned enough to spot what's in the red dot?

This interactive test developed by PlayBuzz is giving half its players confused faces and squinty eyes, and the other half a smug sense of self-satisfaction. Stare at the big red dot below and see if you can make out any vague image within it. Keep a look out for the outline, but also some of the finer details of the picture. Once you think you're done, give it a click and find out how sharp your eyes really are.