Of course you are correct. Luckily, one only has to place the PJ as close as possible to seated eye level while avoiding the blocking issues you have pointed out. Incidentally, those same blocking issues are the reason you will never achieve 2.4 gain with the so-called 2.4 gain HP. You can come close (e.g., by wearing the PJ as a hat), but to approach 2.4 gain the lens would have to be right between your eyes, which I'm told is quite uncomfortable.
3/1/11 at 8:24am