I know this habit - constantly 'checking' and comparing the actual eyesight and trying to make out improvements - very well.
Recently I found out, how bad and 'destructive' this is; at least the way I was doing it.
My wrong way of comparing was: trying to 'grasp' to whole seen picture in one look and commpare it to the (former) equivalent in my memory .
That means: comparing today's bad
habit (looking at the wohe picture = staring) with yesterday's bad
And it is not surprising to find not much improvement this way...
Instead of this (if you want to compare - and I find it very hard, almost impossible not
to do this) one should compare, how much more the right way of looking at things has already become a new habit, comes naturally and automatically.
Since I realized this, I'm less 'fighting' against the blurr as a whole and tell myself: "This is normal, the picture can't be other than blury when my attention is focussed on a too large area; it can only 'clear up' starting from a small point."
This takes an lot of stress away, reminds me more often to practice correct seeing habits and then I really see improvements.