True, but not relevant and not a contradiction of the comment. Pannoniae says that the empirical decline in usability of software is attributable to changes in the UI and not attributable to changes in his eyes. The fact that changes in his eyes exist is not a refutation.
One thing that I've found interesting (in my 40's and slight astigmatism) is how the effects of eyesight show up in interfaces or where there's contrast with brightness/darkness.
In the physical world that'd be issues like bright points like car headlamps or street lights having a large corona/starburst, or if you're looking at a bright object against a dark background such as reading a book where it's lit in a darker room the 'bloom' will obscure what's behind it. On a screen with much brightness I'll get similar effects if there's contrast. I've been window shopping for a HDR display for a while now and wondering how much benefit I'd get out of it seeing as the main selling points are the brightness/contrast, especially when you're getting into the various forms of local dimming to present the media at its best.
For me, with (mostly-corrected) astigmatism and some (uncorrectable) higher-order aberration, dark on light is the only thing I can read fluently. The worst case is ‘black holes’ on a light page, as are fashionable for illustrating command line examples (and f—ing github's CI log view), especially combined with Las Vegas syntax colouring of varying brightness.
