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Optical illusions have been baffling human beings since they were first discovered.
Nowadays, many illusions are shared on social media, sparking interesting debates about the image and what may or may not be visible within.
A recent example was shared on Twitter, and users are picking each other's brains over what number is concealed.
The image shows a black and white circle with a series of numbers hidden within it. The question is, what number do you see?
At first glance, you might have seen 45283. However, it appears to be 3452839 for some people upon closer inspection.
The tweet has gained a lot of attention with over 4k comments. Naturally, users can't understand why everyone isn't seeing the same number they do.
One person commented, "45 283...and what's the catch? Should I book an appointment with my GP?"
"I can only see 528. Does that mean anything about my eyesight?" said another.
A third person added, "I can see 45283, since looking at the other replies I've others are seeing 2 other numbers. I can see there are numbers there but can't make them out."