Hermann grid
What do you see at the intersections?
Scintillating grid
What do you see at the intersections?
Mach bands
Do you feel the right side of each band is darker than the left side?
Munsterberg illusion
Are the horizontal lines in parallel with each other?
Fraser illusion
Are the grids crooked?
After image
First fixate on the cross on the left for a minute, then quickly move to fixate on the cross on the right. What do you see?
