Can you find the curved line in this optical illusion? It isn't easy

Do you have a great eye for detail? Then spotting the curved line among the straight ones in this illusion should be too hard for you.

Optical Illusions for Kids to Make - How Wee Learn

Find the hidden faces in these 7 tough brainteasers

The 'Secret' to Anamorphic Illusions, by Thomas Quinn

Learn How to Draw Amazing Optical Illusions - Topeka & Shawnee County Public Library

Find the hidden faces in these 7 tough brainteasers

How to Draw Curved Line Illusions - Spiral Sketch Pattern 10

30 Optical Illusions That Will Make Your Brain Hurt

Funniest optical illusions that will make you laugh AND test your brain

64 of the best internet optical illusions around: You won't believe your eyes

How to Create Parallel Line Art Using Available Tools