Optical Illusion: 6 intriguing optical illusions could improve your eyesight

Psychologists at the Universities of Glasgow found that staring at an optical illusion can improve visual acuity and allow you to see small print.

Optical Illusion to Test Your Vision: Find two hidden faces in 6

30 Optical Illusions That Will Make Your Brain Hurt

25 Mind-Blowing Optical Illusions That Play Tricks On Your Brain

Exceptional Eye Tricks: 9781936140732: Honeycutt, Brad

Optical Illusion: Find The Correct Word In 9 Seconds

Optical Illusion Vision Test: Can you find a dog in the picture in

Optical Illusion: 6 intriguing optical illusions could improve

50 Accidental Optical Illusions People Captured On Their Cameras

Optical illusion has hidden animal – but only people with sharp

Hidden Girl Optical Illusion: Find The Girl In 8 Second QUIZ

20 amazing optical illusion drawings: How they work & why they can

30+ Optical Illusion Puzzles to Challenge your Sight - Scroll Down

10 Fascinating Optical Illusions Lesson

The coffer illusion has people struggling to see circles - Upworthy

View Amazing Images That Seem to Move