Second update to reading glasses experiment (previously: https://schelling.pt/web/statuses/105589824902267696). I could read all or all but one letter of the 20/30 line on two eye charts, and got a decent portion of the 20/25 line after my eyes had a bit of time to adjust. I checked my blur-free visual range twice and got 43 and 48 inches, which would mean myopia of 0.8-0.9 D. I'll start routinely testing my vision in the nighttime (when it's typically worse) this evening.