New Delhi, Aug. 1 -- Optical illusions are the best way to ensure your vision and mind remain as sharp as a knife! In this optical illusion, players need to find the hidden hair tie left behind in the pool. The challenge? Spot the hair tie in under 10 seconds. If you manage to do that, you may have sharper eyesight than the average person.

While many optical illusions take aim at visual perception, this one also plays on how quickly your brain can filter through distractions and identify the subtle shapes and patterns. The hair tie in question is small and easily gets lost in the visual chaos of the pool setting.

The rippling blue water makes it even harder to find the hair tie. Those who manage to find it under 10 seconds are considere...