I also got that age that my eyes don`t play along anymore,
Using the opensight without glasses is impossible, and hunting with glasses are filled with problems, dust, dirt swet and such things that make glasses mostly impossible to see thru.
I tryed different mounts on my 470 NE Krieghoff they did not manage the recoyl, so what do I do?
I contacted Krieghoff in Germany and they told me that they recomend Henneberg prisma mount on a Aimpoint micro. OK I found a dealer in Germany that have this type of mount and order one, 3 days later I got it.
A friend of mine also have the same mount on his 500 and it work perfect, easy on and off without doing anything with the point of impact.
It was also very easy to mount on the sight.