Let's talk strike zone and changes

[Panda Bear]

could your eyesight be changing? Specifically, depth perception.

At the risk of inviting blind umpire humor to a serious question, this could be a factor. As we age, eyesight changes, sometimes to the point that depth & distance judgement changes. It can be suttle & gradual, so that you don't notice it yourself, but maybe where you now see the bottom outside corner to be & where others have and continue to see it may not be the same place.