Illusion

I received a forwarded message, which claims that the above image could be read comfortably by blurring eyes, but not with the clear vision. It is true in fact. If you close your eyes 90% then you are able to read it.

This image was constructed beautifully. Initially our brain tries to construct the letters using white blocks. But white blocks are just gaps. The letters are really constructed by black blocks.

Second thing is the shading creates an illusion that the white blocks oriented roughly 30 degree to the left of our straight eye site and you are viewing the blocks from slightly above. This is the predominant view. But this is exactly opposite when you consider black blocks. The black blocks are oriented roughly 30 degree to the right of your straight view and we are viewing that from below. This is a hidden view. We can't have both views simultaneously, because they contradict each other.

You can ask your brain to switch view instead of closing the eyes to 90%. It's little bit hard, but not impossible. First you should train the brain, for that you should tell the brain that the letters are made up of black blocks, they are oriented 30 degree to the right and we are watching it from slightly below. Once you keep all this in mind and then you are able to see the words.

Try this also, close your eyes to 90% then slowly open your eyes and see at some point the word will disappear. It is quite interesting to watch it disappearing. Then try to force your brain not to switch the view, even after completely open your eyes. It is possible, but you can't hold that view for long time. I try to see how fast I can switch the view back and forth with out closing the eyes. It's hard.