eyes wide shut
I used to sit according to the teaching of a Theravada school of Buddhist practicioners. The practice was similar to the Zen tradition of sitting, with a major difference being eyes were closed.
After reading about Zen for the past few years, I've recently begun sitting with my eyes open. The eyes-open thing is a bit distracting, though, and I'm not sure what the best technique/attitude is for the distraction.
At some point while sitting with my eyes open, my vision begins to swim, blur, or cloud over. What should my attitude be when this happens? Should I re-focus, or allow the blur to occur? If I let the blur continue, it usually obliterates my vision at some point, to the extent that I'm not sure if my eyes are even open anymore. It seems that at that point, I might as well close my eyes.
Is maintaining focus with the eyes the right thing to do, according to the Zen concept of maintaining the mind's focus?
Any insight from experienced Zen practitioners?