The human eye is a marvel of design. All the parts work together to provide us with a vivid and colorful mental picture of our surroundings. As an astronomer, one aspect of human vision that I find particularly amazing and useful is the ability of the eye to adapt to extremely different lighting conditions. At night, the eye adjusts to be able to see stars that are 12 trillion times fainter than the sun. The way this mechanism works is ingenious and is merely one example of the cleverness of the Lord and of His grace toward us.
Our eyes and brain provide us with a nearly instantaneous mental picture of our immediate surroundings. This in itself is amazing and should prompt us to thank and worship our Creator. But the Lord has enhanced our visual experience with a wonderful feature: color. What exactly is color, and how do our eyes and brain process it?
I recently had the opportunity to ride in one of the newer Tesla electric cars. The dashboard had a single touchscreen which displayed a perspective view of the vehicle itself – as if seen by a bird following the vehicle by 300 feet at about 100 feet in altitude. The screen also displayed grayscale model representations of all surrounding vehicles, along with the markings on the road, the speed limit, nearby traffic lights, and other driving information. In principle, you could drive the car without ever looking out the window by looking only at the screen. Apparently, cameras surrounding the vehicle feed images into a computer which constructs a 3D virtual model of its environment, which is then displayed on the screen. In other words, it does in a very limited way what your eyes and brain do with much higher fidelity every second of your conscious life.