Everyone can see the ice skater but you need 20/20 vision and a high IQ to spot the mistake in 7 seconds HERE is another fun brain teaser to test your eyesight and powers of logic.
Everyone can see the ice skater on the rink - but only those with 20/20 vision and high IQ can spot the mistake in the image within seven seconds.
It tests your ability to process a high volume of visual information and the ability to concentrate under high amounts of pressure.
Psychologists at The University of Glasgow found that staring at an optical illusion can improve eye sight by allowing you to see small print.
People who are able to solve the puzzle quickly possess good observational skills and high cognitive speed.
