Observation Visual Test: Only 4K Vision Can Spot the Letter C in 7 Secs admin 1 week ago Latest News Comments Off on Observation Visual Test: Only 4K Vision Can Spot the Letter C in 7 Secs 0 Views Put your vision to the test with this observation visual challenge! Can you spot the letter ‘C’ hidden in the puzzle within just 7 seconds? Share Facebook Twitter Stumbleupon LinkedIn Pinterest