Optical illusions are a fantastic way to challenge your brain and improve your observation skills. In this puzzle, you are tasked with spotting the hidden letter O among a sea of D’s within just 5 seconds.
At first glance, all the letters appear identical, which makes the challenge quite tricky. However, if you look closely and focus on the shapes, you’ll notice that the O is a perfect circle, unlike the D which has a straight edge on one side.
Optical Illusion: Within 5 Seconds Spot The Letter O among D
Optical illusions like this one take advantage of similarity and repetition to trick your eyes. In this challenge you must spot a single letter O hidden among many Ds within 5 seconds.
Because the shapes are almost identical at a glance both are round with a small stroke difference the brain groups them together and overlooks the subtle gap or straight edge that makes a D different.
The trick is to slow your eye just long enough to inspect the inner counters (the enclosed spaces): the O has a perfectly closed round hole while the D shows a straight side or flattened edge. Finding the O quickly tests your visual acuity, attention to detail, and how fast your brain can break a repeating pattern.

Optical Illusion: Within 5 Seconds Spot The Letter O among D - Solution
In this optical illusion puzzle, the hidden letter O is cleverly placed among rows of the letter D, making it tricky to spot at first glance. However, if you carefully scan the grid, you will find the O located towards the bottom-right corner of the image.
Unlike the D, which has a straight vertical edge on one side, the O is a perfect circle, making it stand out once your eyes slow down and focus. Spotting it within 5 seconds demonstrates strong observation skills and quick pattern recognition.
