The eye is an amazing and powerful optical tool. The eye can detect colors, adjust rapidly to the brightness of the surrounding light and focus automatically. Modern cameras have only recently started to approach this level of sophistication. However, the eye and the brain still can do something that modern technology cannot do and that is automatically recognize its image (or picture) – even when part of it is not there or not seen clearly. Sometimes our brain can be tricked by what our eyes see. When this happens we call it an optical illusion. We learn to understand or perceive what we are looking at, and we get used to how things are supposed to be. Sometimes our brains fill in the missing pieces. Other times our brains get the clues all wrong.
When you watch television you are watching an optical illusion. It looks like the pictures on the TV are moving, but they are not. Television is really lots of still pictures that are shown to us very quickly. Our brain cannot look at that many pictures one right after another that quickly, and it puts the images together because it has learned to expect the movement.
What may at first seem ordinary is not always that ordinary. Sometimes the things we see can change before your eyes!
Optical illusions are perfectly normal. Every person with normal eyesight experiences them. We are simply deceived by what we see. God warns us “(For we walk by faith, not by sight:)” II Corinthians 5:7. Satan will use anything he can to trick you into not believing in God (false religions, evolution, etc.) But if you have faith in God and His Word (the Bible) you will not be deceived. “And ye shall know the truth, and the truth shall set you free.” John 8:32