OPTICAL ILLUSIONS
Sometimes
our eyes can
play tricks on us. Some things that we see
make us unsure of what we are really looking at - these are called
optical
illusions which is another way of saying "tricks
played on the eyes". Some people make up optical illusions just
for fun or to show us how our eyes can be tricked. Here
are some to try yourself and to show to your friends...
Missing Piece of Pie
The middle bar
The brim of hat
The long line