FEW!...Made in PhotoShop.I tried to make one eyes pupil darker than the other,I think it came out pretty good.
Original picture:
http://mail.google.com/mail/?ui=2&ik=14c4baed90&view=att&th=125b3a3513561203&attid=0.1&disp=inline&realattid=f_g3hwci0m0&zw