This is the illusion which can cause harm to your eyes if you look continuously .Try looking at it for 45 sec and then see the wall you will see some radiations of this kind coming out of your wall too
This is actually not true in all cases.Just because some people see what they percieve,it has been stated here

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(13 votes, average: 4.15 out of 5)
its good it changes its couler
that is eye!! because clear on blue with red that this eye
this may look like my favorite but i like it