To try first,go to Walmart and buy a pair of their cheap glasses. 1:25 or 1:50 power.
That's what I do when wearing my contacts for distance and wish to shoot with iron sights. Focuses the sights to usable definition, and doesn't blur the target badly. The technique that allows me to hunt with a primitive muzzle loader is to perch a pair of 1.25x readers down on the tip of my nose and when I shoulder the rifle I push them up in front of my eye with my right thumb with the same motion.
