I don't know about Ron, but my vision is blurry at all distances. I've gotten used to shooting with blurry sights and target.
If you don't tell yourself...I can't shoot! The sights are blurry. You'd be surprised how well you can shoot at closer ranges. Up to 60-70 yds I can keep it in the kill zone. So, I use that as my max distance, but try to get much closer.
The good part about shooting so close is you can use mild loads. Which works for me.
Sort of an old man system. Open sights, close shots, and mild loads.