I'm starting to need more 'n more help with target focus as these eyes age.

Being a relative NOOB to modern precision optics since my return to shooting and the mysteries of the AR-15 system earlier this year, it has been difficult to integrate the changes in these 65 year old eyes with the available parallax and target focus options in modern powered optics. I believe that I now have a handle on my vision deficit and parallax adjustment systems, but I am having hard time finding reference to the presence or absence of adjustable diopter eyepieces in specs for most of the scopes that I’ve researched on the web. I was dismayed to recently discover that the highly thought of and $,$$$ "all-new" Nightforce NXS 2.5-10 x 32 Compact does not provide diopter adjustment. So I'm back to the drawing board.

Advice would be appreciated on whether or not the following optics provide adjustable diopter eyepieces?

Leupold 4.5-14x50 Mark 4
NightForce 3.5-15X50 NXS
Burris XTR 3X-12X-50

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