Optical illusions are not just puzzles, they’re thinking games that challenge how fast and how well we catch details. With a first glance, the image above seems straightforward, full of the word “Fast” repeated endlessly in a neat grid. Don’t be fooled, though! Amidst the ocean of Fast, a sneaky imposter lurks, the word Last.

Image: Mint
Your task is to see the hidden “Last” within 7 seconds. Easy to do? Not so. The words are nearly the same, and our minds start to read through repetition without catching small distinctions. Which is why finding the odd word is harder than it appears.To succeed, stay calm and scan row by row instead of glancing randomly. Pay close attention to the first letters, your eyes are looking for an “L” hiding among a wall of “F”s. Remember, you’ve got only a few seconds, so focus sharply and don’t blink!These time trials are not only entertaining, but also excellent at sharpening observation and focus. If you can see “Last” in the 7-second window, that indicates your observational skills are finely honed. Many of us fail, so cracking it within a speedy time is a true accomplishment.Well, are you ready? Look at the puzzle, set a 7-second timer, and show how keen your eyes actually are!Did you succeed in finding it before the time ran out? If so, well done, you outsmarted the illusion! If not, don’t worry. These challenges are meant to mislead the brain and cause you to doubt your eyes. The more you solve them, the quicker your visual abilities will be.

Image: Mint