Perhaps you have used digital cameras and have had the wherewithal to use a photo editing program to remove red eye or change the color cast in a photo. It is amazing what you can do with programs like Photoshop. If fact it has become part of the news in the last few years how can you trust what is printed in the media since it is so convenient to be able to "photoshop" a picture. Such image processing tools are very sophisticated and have taken engineers years to understand how images are interpreted by the viewer and how colors and pixels work together to give us the illusion of seeing an image that looks so real.
What is really fascinating is that our brains and the eye must do similar things in real time! We know that the eye sends signals to the brain from each rod or cone which are the individual pixels of the image we see in our brain. And the cones have the ability to detect red, green or blue wavelengths of light. This is the exact same thing a digital camera does! But furthermore our brains must then take millions of these signals and put them together into an integrated image and then do pattern recognition so that we know what it is we are seeing and can compare it with our image memory. Once you see an image it becomes a permanent part of our memory. Perhaps a bit fuzzy as time goes on, but we still can immediately recognize the house we grew up in after many years away, or of a friend's face we haven't seen in years.
The significance of this is that not only must there be a way to capture photons of light, focus them, detect them, and then send an electrical signal down the optic nerve to the brain, but there must also be a way to process that information to form a mental picture. Furthermore do this so fast that a baseball player can see the stitches on a fast ball coming at him at 90+ miles an hour and coordinate all this information into a split second muscular response strike the ball with a bat.
Praise God for the miracle of our eyesight!