For me optical illusion is exercise for my brain. It is entertaining to my eyes. I need see optical illusions several minutes everyday. And this app amazed me. Its not an ordinary app of just pure colorful illusions but it has words of wisdom thats being created and being explained. Kudos to its developer. Its cool and its fun! I am inviting u to try it.
byutifulmo about Optical Illusions - Images That Will Tease Your Brain, v9.0