The internet loves an optical illusion! McDonald's used that to do some clever marketing. The optical illusion has everyone disoriented.
Posted on the McDonald's UK Facebook page, the optical illusion is captioned: "Tag a mate who should read between the lines". Yes, the answer is actually hidden between the lines. Posted on Sunday, the post has tons of reactions from people who are finding it really hard to spot the answer.
Here's the optical illusion:
Stared at it long enough and couldn't find the answer? And are your eyes okay?
Want to know what it says?! Back up and stare at it!