I have a hard time buying this theory. I'm working behind a screen a lot, and my vision was mostly ok, but about 6-7 years ago I discovered I am no longer comfo

I have a hard time buying this theory. I'm working behind a screen a lot, and my vision was mostly ok, but about 6-7 years ago I discovered I am no longer comfortable watching TV. I got glasses, which I wore only when watching TV (no more than an hour or two per day, and not every day - on average, would be around an hour a day or less). Recently, I had to take a vision test for driving, and I discovered that while I can still subjectively see OK, I can no longer legally drive without glasses. I went for an eye check and got a prescription which is slightly stronger than my old glasses, though not significantly: I can drive - and pass the eye exam - both with my old and new glasses. Clearly, I have some myopia, and clearly, it got worse with time, though not drastically so. Also it sounds very unlikely that it was caused by short period I have been wearing glasses to watch TV. Moreover, since I've been going around for a while with no glasses, while my vision was somewhat myopic (I didn't have vision test for years and didn't feel the need to have one) - I have essentially been following the instructions in the article, without knowing it, as I understand. Yet, my vision didn't become better - in fact, it became worse, albeit slightly (which I totally expected with age, so I am not surprised here).