Wow, that’s really interesting and I never knew that
I’ve ally had too much personal experience as carer for those with psychosis, with a exh with schizophrenia for 2o years, and that’s got me thinking about all sorts of theories I have around dreaming and it’s role on psychosis, especially when I read just now, on rising this, that the congenitally blind do still have REM and visual dream - not as much as the sighted or those that develop vision loss later in life - but they still do.
all the more curious as congenital deafness, which you’d think would work similarly to this congenital blindness protection, given hearing voices is much more common with schizophrenia than visual hallucinations, actually increases the chances of psychosis.
BUT here’s the curious thing. My dad has lost his sight (well most of it) in his 80s, and as a result has developed Charles Bonnet syndrome. This is a form of visual hallucination where the brain is “filling in” for missing external visual stimulii it’s received in the past. It’s quite common apparently. But, from that he has now developed very acute and sudden onset psychosis and delusions. He’s in a psychiatric unit now, and they can’t get to bottom of it. So, whilst congenital blindness means schizophrenia pathway doesn’t activate, developed blindness seems to increase risk if delusion and visual hallucinations
Right now the theory is that schizophrenia and related psychotic illness are to do with the dopamine pathway . The common drugs used are developed to target thst in theory. but i have a hope that in 59 years form now we will find it outrageous and hysterical that we didn’t know how these terrible illness worked, and the drugs used to treat them were so useless. Right now, the prospect is so bleak for many with these illnesses in the long term - it shatters the patient’s lives and those around them.
I wonder why more studies haven’t been done on this curious blindness link- surely that’s a key to understanding what causes them
thank you for sharing this, definitely given me food for thought,