Move your head towards the screen and see what happens
Is the distance AB = BC?
Is the white bar longer or shorter?
Do the lines bend?
What do you sEe?
Bird in a cage
What can you see?
What does the sign say? Are you sure? Really? Truly?
Do you see the three faces?
From where comes the hole?
How many colors you see?
Stare at the bulb for 20 seconds, then stare at something white and the bulb will glow!
Circles or Sprials?
A Face or A Liar?
Focus on the dot and the haze will disappear
Is the dot in the middle larger or smaller?
Eskimo or Face?
How many legs?
Are the lines parallel or do they slope?
Count the Dots - If you can