When I was a hardcore JW, I closed my eyes and paid attention to the prayer, because I believed we were communicating with God. What a privilege!
Now, it has been some time since I closed my eyes when the JWs pray. I don't believe it, so why even close my eyes.
But, I am a new elder and I noticed that several other elders doesn't close their eyes either when they pray in the BOD meetings. I'll tell you even more, they keep writing and reading stuff. Some of them even in the "regular" meetings. Have you ever noticed something similar?