six times magnification should easily get you to 100 yds (and beyond)... if you are having difficulty, it's probably not your eyes (or age) - but more likely low quality optic.
There are lots of threads on this forum (and throughout the internet) with detailed info/reviews... you might want to determine spending limit and go from there (it doesn't have to be a lot - but of course cost is relative).
But to address you question directly - no, a magnifier isn't the answer... in fact magnifying a magnified optic will most likely further distort.
I'm outa here!!! Less than two week countdown - See Ya CA (you slimeball of a state)... Good luck CGN Brothers
Originally Posted by FireCloud9
We're screwed. The left was fooled by Obama and the right is being fooled by Trump.