Optical illusions are images that are intended to trick our mind. In popular culture, they are often used as simple intelligence tests.
Optical illusions can help you improve your concentration and observation skills. They can also help us understand how our brains work.
Studies suggest that regular practice of optical illusions can increase alertness, reduce stress and develop better power of concentration in people.
If you want to quickly test your observation skills, try this optical illusion challenge right now!
Optical illusion to test your vision: discover two hidden words in 9 seconds
Take a look at the image below.
Source: Rainbow Riches Casino
The stamped image contains two hidden words and the challenge for readers is to find those words in 9 seconds.
Your time starts now!
If you look closely at the image, you will be able to spot the two hidden letters.
Have you seen the words?
Hurry up; the clock is ticking.
Do I need a hint?
Here it is.
Both are four-letter words.
Did you notice the words now?
We think some of you will have already noticed the words.
Congratulations! You have very sharp eyes.
For those who couldn’t. Scroll down to find the solution.
The words are Free and Spin.
If you loved this optical illusion challenge, you can try more challenges in our recommended reading section below.
Find 3 differences between the images of the lady with the wheeled bag in 12 seconds!
You are a puzzle legend if you can find the ball on the beach in 7 seconds!