This is a pretty interesting concept, and something I’d like to try out at the range some time. A friend and I did something along similar lines a couple of years ago. We didn’t close our eyes, but tried some point shooting (unaimed shooting) and also weak hand shooting (both aimed and unaimed). The results really surprised us, because we were much better than we thought we would be, both in the point shooting strong hand and also the weak hand shooting. Turns out much more of the shooting process is subconscious than we thought. Both of us learned a lot that day at the range.