Another day, another fiendishly difficult optical illusion arises to leave the internet scratching its head.
Filipino Jeya May Cruz posted an image of a rug, a table and an incredibly well hidden mobile phone on her Facebook page alongside the caption: "Hindi ako makatulog" - "(Since) I can't sleep" in Tagalog.
She then invited her friends to attempt to spot the iPhone in the picture.
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So far the post has been shared 18,000 times, with people from all over the world unable to locate the device.
In a follow-up Facebook post, Cruz wrote: "Thank you everyone, I can't believe this would become viral. I'm sorry if it made your eyes hurt and head ache ... Thank you again!"
In a poll, 48 per cent of Daily Telegraph readers "failed miserably" at the challenge, although 30 per cent claimed they could find the phone in less than ten seconds.
If you're still unsure of the location of Cruz's iPhone, here's the solution:
Take a look at the right-hand leg of the small table and look just to its right. You'll see the stripe in the carpet change from grey with black-and-white flowers to solid black with only white flowers. That's the floral pattern of the iPhone's case.
