It is true that I have no depth perception, but it has been proven that stereo vision is not the only way we judge distance. Again, like I stated, I have never had any problem judging distance, playing sports, or even flying. And to prove it to my friends who thought that I needed depth perception to judge distance, I every time I parked or moved an airplane, I would judge the distance between each wing tip or between the tail and the hangar wall, and I did just as well as they did. It has been proven that stereo vision only aids in depth perception within 30 feet. Past 30 feet, light rays enter the eye nearly parallel, so both images are pretty much the same. Within 30 feet, I have never had a problem until I was specifically tested for depth perception.