46 and noticed a deterioration last few years, and quite a dramatic change over the last 12 months, reading small print was/is a struggle. Tried a pair of 1.0 reading glasses in Superdrug today, which I believe is the weakest power they do, and the change is phenomenal - my iPhone screen looks like an iMax in comparison, massive difference, like I can almost see each individual pixel.
I'm actually quite annoyed now because Boots optician sold me two pairs of £125 glasses about four years ago based on an eye test, and after a while I just stopped wearing them because I didn't really notice any perceptible difference with them. I bet even back then I could have got away with a pair of £10 reading glasses for the mild inconveniences I was having.