I'm 43. For the longest time, my RX was very stable, nearsighted about -3.5 in both eyes, from the end of puberty to about 2-3 years ago. Until recently, I'd toss in a set of contacts and I was all set for the day. Now, I just don't seem to have the ocular focus-range for one RX to do it anymore. Depending on the time of day, and what I've been up to, I have trouble with both reading text on my phone up-close, or having good sharp distance focus for night driving. It's intermittent and I have to blink a bunch of times to refocus on what I'm doing and it's getting annoying.
Some of it I'm sure is normal aging. Some of it may be not leaving the house very much, too much screen-time, not getting a wide range of focus exercise. I absolutely do have to use some reading "cheater" glasses for stuff like soldering, and that's acceptable. But when I can't find a set of contacts that let me drive AND use my phone (not at the same moment, of course) that's a major problem. I actually have an appointment with my eye doc this week. I guess it may be time to talk bifocals or something.