Text on Theory of Vision
HOW MANY TIMES have you come in for a landing and really greased it in-three feet up? Perhaps you've come in right down the centerline with a beautiful flare and touch down-only to find that you did it all five feet off to the side of the runway. Most of us tend to blame these types of arrivals on depth perception, the wind, the phase of the moon, or any other plausible excuse we can think up. Take heart. One of the most prestigious research organizations in the world has come to our rescue. While I am sure they didn't have RC fliers in mind while conducting the research, the results of their effort appear to be applicable.

