I noticed that when I have ciliary spasm, the range of sharp focus when measuring cm distance is reduced. In other words, the image goes almost immediately from myopic to hyperopic defocus as I bring the object closer. And of course cm distance is drastically reduced as well.
Normally that does not happen.
This is interesting. It almost mimics presbyopia, in that accomodation no longer works as it should. I’m far too young for actual presbyopia, so this is my interpretation.
This makes me wonder if ciliary spasm can be misinterpreted not only as myopia, but as presbyopia, in an exam. Imagine not only getting over corrected with minus at distance, but also with extra plus at near to offset that extra minus power! Maybe this is why some presbyopic age people who reverse ciliary spasm and myopia have an improvement in their presbyopia soon after.