Reading it now, I am reminded of the importance of sleep. The only time I have experience "visual aberrations" is when I have been very sleep deprived. Items in my periphery would rotate, like my mind was attempting to dream. And then there is this description of one of the cases

> single male who works for the U.S. Postal Service, typically during the midnight shift.

People should be very very cautious about working swing shifts or night shifts.

https://time.com/3657434/night-work-early-death/

I am not that far in, but it looks to me like STPD is a precursor to full Schizophrenia, and that if caught early could avoid it entirely. This might be what the book says.

Oh the DSM, it seems chock full of ... spicey illinformed kinda right by accident correlation isn't causation kind things. After reading enough of it, I don't even see it anymore. I am sure there is still some phrenology in there.

Hazing as a bonding exercise is barbaric. I have seen scrapbooks of USN sailors that have crossed the Tropic of Cancer and Equator. Yeah, no.