The topeak that is integral on some of their pumps is one that I have used and found hard to read even when my eyes were better as well as kind of inconsistent in readings on the one I had. I think maybe the standalone that I had that I kind of liked was a presta only zefal. It may be around somewhere if I can find it.
It holds the reading so you can take it to your eye and good light to read unlike the ones on some pumps