What pupillary distance actually changes.

+20 Pupillary Distance

Scoped view of a training dummy in a shooting range, showcasing the impact of pupillary distance adjustments on field of view and reticle alignment, image appearing zoomed out.

More outside the scope is visible with +20 pupillary distance.

Compare the hands in the +20 image vs the -20 image.

-20 Pupillary Distance

Scoped view of a training dummy in a shooting range, showcasing the impact of pupillary distance adjustments on field of view and reticle alignment, image appearing zoomed in.