I’m trying to get out of the habit of staring at my juggling balls while I juggle. It’s harder. I can do some contact juggling with my eyes closed, but not everything. And I’m working on looking through the cascade while juggling (this way I can watch TV while juggling!).
I did find some discussion here and, of course, there are some videos on youtube. I find it kind of peaceful to contact juggle in a pitch dark room.