I've heard it said that Qi Gong without natural light is impossible. Not sure what to make of that, but I'm getting sidetracked. The question I wanted to ask was, is there a way of doing this practice without looking at the sun? The sun's light is pretty universal after all. I burnt my retinas slightly from looking at the sun as a kid and has been a slight colour variance between my eyes ever since. I just feel a little wary.