Bhubaneswar, Feb. 16 -- Illusion is derived from the word illudere, which means to mock or trick. So, the primary idea of an optical illusion is to deceive the human brain by tricking it.

There are three types of optical illusions- literal, physiological, and cognitive.

The beauty of optical illusions is that they engage the user's attention for a brief time, which helps sharpen the brain.

So if you are an optical illusion enthusiast, here's one that might intrigue you. It challenges you to spot two hearts among a bunch of rose flowers within nine seconds.

The picture shows a field of rose flowers. What makes it difficult to spot two hearts is that they are perfectly camouflaged between the rose flowers.

The illustration was made by ...