(98 votes)
This is fascinating. These rooms are painted so that, when looked at right, optical illusions will appear. Very cool indeed. MORE PICTURES INSIDE!
(21 votes)
Here’s another classic, known as the Muller-Lyer illusion. Which of the horizontal lines is longer?
(25 votes)
Here is an “impossible” version pictured with a high degree of realism. The two points where the linear edges must overlap have been purposely confused. The resulting figure produces an even more jarring figure-ground dilemma, likely to be interpretted as humorous or upsetting.
(36 votes)
Do you find that black spots appearing? How many black dots can you count? This illusion is a classical one and originally discovered by Elke Lingelbach.
(53 votes)
Another popular one – and quite unnerving if you’ve never seen it before… Close your left and eye and just focus your right eye on the tiny cross. At some point the big circle will disappear as it crosses your ‘blind spot’. If you can’t see this effect, then try sitting closer/further from the screen.
(12 votes)
The idea is to focus on the dot in the centre and then move your head constantly towards and away from the monitor. You should see the circles rotate spookily! Press the F11 key in your browser to see the illusion at full screen!
(35 votes)
Which way is the wheel turning!? Focus on the red dots and follow them round… it appears to be rotating anti-clockwise. However, if you follow the yellow dots round instead, the whole wheel will be turning the other way! – clockwise!
