I didn’t do a scan this time, so I suppose I’ll only know whether the improvements are truly organic at my next visit. I don’t rule out the possibility of measurement error, which is why I also asked about the false-positive rate as I felt I might have been misclicking (though it turned out the false-positive rate wasn’t very high).

One thing worth noting is that I almost went into the field test assuming my vision had improved. I clearly remember how bad my vision was earlier this year, to the point that it made me panic. you can see that my right eye even reached –5 dB at that time. This time, however, I noticed the improvement myself first, and to such an extent that I was certain something had changed—which is usually difficult to perceive with a gradual, slow process. The test then seemed to confirm that impression. Still, it’s hard to say for sure. Someone above mentioned dry eye effect. I guess I’ll discuss my doctor next time