As I have grown older, my eyesight has changed. No surprise here. I have found that resetting the focus on the scope seems to cure that. All my scopes, save a very few also have A/O. To "reset" my scope for my vision, I go to low power, set A/O to 100, then adjust the focus ring (eyepiece) on a target at 100 yds until it is clear and sharp. Once there, it isnt a problem geting things clear and sharp at different power ranges and distance by using the A/O.
No such thing as a stupid question. What is stupid is not asking it.