Optical Illusion(Do i see triple L or what??)

Recently i found out that Optical illusion is quite interesting stuff which will stimulate nerve and mind to think sort out of the pictures.Optical illusion is also known as visual illusion that differ from the real objective of the image project.Sometime our eye do deceive us from seeing what is true or real in front of us.Optical illusion can be categorized into brightness, tilt, color, movement types.Optical illusions were first used by the Greeks as a concept to build the temple slantly so that it look like stading straight(History of Optical illusion)Many artists have worked with optical illusions such as M. C. Escher, Bridget Riley, Salvador Dalí, Giuseppe Arcimboldo, Marcel Duchamp, Oscar Reutersvärd, Victor Vasarely and Charles Allan Gilbert(Wikipedia).Here are samples which i like:
Which line A and B is connected to C? Ans:Actually they both connected to C.
Is the dot in the middle same size? Ans: Both are same size.
Do the line straight or curve?Put something straight near it.
What you see in the two pictures below?
See the dot in middle for a minute,the pink dot around will skip a beat and disappear
Follow steps below in this two pictures,miracle will appear~

Do you see Jesus and Obama=)
Didn't see anything in the below picture?? Walk several steps behind~
Think you are smart??Test yourself.
Halo,you miss the double "the".
Calculate the black dot. Can you calculate only the black one?

Finally, See anything...try look even more closer...still haven't see anything yet...read this"Got ya,it is just a joke",haha~
Hope you enjoy it~you can see even more optical illusion pictures in Eyetricks ; Constructions ; Celebrities ; Cooloptical ; and Abcarcade