i dont know.. i dont think i want to put stuff in my eyes and take it out everyday.. had a friend that tried it.. took him hours to get it in.. he's eyes would get all red and scratchy.. he eventually gave up.. and got back to he's glasses..
maybe its just his experience that put me off.. maybe you have some better info for me
i never really looked into anything in this "glasses" world.. so i really dont know much..