It really depends if you are using "naked" eye targeting or through a telescopic targeting system, in the former case, lenses corrected for "infinite" (more than 100 feet) distance imaging would be best, my guess is that if you are using telescopic viewers, no glasses at all (apart of astigmatism correction?) would do. If you are in the "hand gun" game only, probably your simple "single vision" should do fine. Just an opinion, of course...
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