If you can locate the concealed penguin in under nine seconds, you have hawkeyes.
For those who aren't familiar with these kinds of assessments,
Some of these optical illusions are so convincing that you fail to see features that you normally would have noticed.
Nobody knows for sure how optical illusions work on our brains, despite the fact that scientists have studied them extensively.
These illusions have more than just aesthetic value; they can also serve practical purposes. In a sense, they may be used as an IQ test, which is a good way to measure how smart a person is.