This is an excellent test for determining how well your eyes are focused. According to studies, our eyes work in tandem with our brains. To scan a photograph, the brain sends impulses to the eye muscles.
Test your attention! How many open locks are there in the image?
The data is then sent back to the brain to be processed. It is recommended that you train your eyes on a regular basis because good eye control is required for analyzing moving objects, identifying shapes and sizes from a distance, and reading!
Here is the answer!!!