The blur is gone. Well, almost. Yesterday's foray into the optical shop was interesting. I saw the third optician in four weeks, so I had to tell the whole story from the start. Fortunately, she was very nice and patient and quickly understood what I wanted done. She asked a few questions before replacing the old lenses with the new prescription and made a few adjustments to the fit. Suddenly, or so it seemed, most of the problem I had (blur and distortion) was gone. She said that all she did was to change where the glasses rested on the bridge of my nose, but it seemed to make a difference. I don't really know how or why.
I'll see how it goes until my appointment with the doctor next week. I thought about cancelling, but decided it would be better for the doctor to have a look sooner rather than later. I wore the renewed glasses out of the shop and drove home with no problem. I could see and read the road signs again. And I can see the computer screen without tilting my head up to the sky.