Viewfinder Magnifier for K-5

A question regarding the above.

I am a glasses wearer, will the above help, in addition to assisting with manual focus?

Sorry if the question is so short, but I am wondering for MF and macro use.

i have a gx10 which I think has a slightly smaller finder. You will get some cut off and have to move your eye around to see the LCD readout. But it is very good for manual focus and macro.

I've read a lot about these before I got my Tenpa 1.36x, I don't wear glasses but it already vignettes for me and it needs a tiny bit of moving around to see the edges. I probably wouldn't go beyond 1.2x if I wore glasses.