Another person gave up, saying, “I needed help with this one—way harder than I expected!”

So, what’s the secret to cracking this illusion? Experts recommend starting at the center of the image and slowly scanning outward. Still having trouble? Try shifting your focus slightly to the left—hidden among the branches, a brown spaniel is perfectly camouflaged.

This optical challenge is just one of many viral ‘sniper tests’ taking the internet by storm. From a snow leopard blending into rocky cliffs to puzzles that push depth perception to its limits, these brainteasers continue to captivate and confound people worldwide.

Think you have sharp eyes? Give it a try and see if you can spot the hidden dog before your friends do!