This is my first foray into the red dot zone, also because of the bifocals! I'm probably going to zero it in at 25 yds. Just because I plan to use it for hog/coyote hunting where common distance could range from 10yds. to 100 yds. and thinking a 25 yd. zero will keep me in the kill zone with little compensation. I'll let you know how it goes. I definitely like it so far, even after just one trip to the range.
K