I would really like to investigate this topic more fully. I have read so many comments about ciliary muscles being in spasm, or locked, for years on end that I would like to see a clear distinction between the ciliary spasm that causes pseudomyopia and which can be relaxed by refraining from excessive close vision, and what is called persistent ciliary or accommodative spasm, a rare condition.
I would like to start with this reference to the latter condition
If you think you suffer from this, you might find out, after treatment, if successful, that you are an emmetrope.
Temporary ciliary spasm is much more common, as this article on pseudomyopia (also known as accommodative spasm) makes fairly clear.
My suggestion is that most of us who have had myopia for many years, do not suffer from either of these conditions, although we might have started off with pseudomyopia. We may build up ciliary spasm on a daily basis with sustained close vision and no distance vision, but this is likely to relax to a reasonable extent during sleep. It is difficult to measure ciliary tonus during sleep, so the extent of this relaxation is not known.