Optical illusion: Can you spot the number '78' in less than 7 seconds?
Challenge your observation skills with this optical illusion by finding the hidden number '78' among numerous '70s' within 7 ...
You have 20/20 vision if you can find 78 in 7 seconds!
Optical illusions trick our visual system into seeing things that aren’t actually there or misinterpreting what we observe.
Think you’ve got sharp eyes? Spot the hidden 78 in this brain teaser in under 7 seconds to prove you have perfect vision
A VISUAL intelligence test that deciphers if you have top-tier vision has been created by boffins.  In the challenge, the ...