New Delhi, Sept. 27 -- Optical illusions are one of the internet's favorite pastimes. From hidden animals in busy photos to paintings that hide multiple features, these optical illusions spread quickly because they challenge how we see everyday objects. These brain teasers make people stop, stare, and argue about what is really in front of them.

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Today's viral optical illusion comes from Reddit's r/opticalillusions forum and has left viewers scratching their heads. The post shows a framed painting held up against a mirror. In the main picture, the portrait looks like a woman with long dark hair and soft features. But in ...