A very powerful illusion !
You will clearly see gray dots on the corners of the squares.
This is actually called the Hermann Grid but let's face it,
phantom dots sounds way cooler.
Disappearing Dot Illusion
This is one of the most amazing illusions.
Keep staring at the blue dot in the middle of the picture.
The blue dot will shrink slowly and then disappear completely!
This is due to the color receptors in your eyes getting tired.
Scary Optical Illusion
Keep staring at this picture for about 20 seconds
and
then look at a white surface (a wall or a big piece of paper).
One of the very classic illusions.
The best thing is ; the afterimage seems to be a sharper image than the original.
Scintillating Grid

If you look at this grid, you can see phantom black dots appear and disappear.
Afterimage
Keep staring at the white dot for thirty seconds, then stare at a white wall.
What do you see ?