Select researchers believe that the ties between vision and psychotic 
symptoms indicate there's something new to learn here. Could it be 
that within this narrowly-defined phenomenon there are clues for what 
causes schizophrenia, how to predict who will develop it, and 
potentially how to treat it?

<https://www.vice.com/en_us/article/939qbz/people-born-blind-are-mysteriously-protected-from-schizophrenia>https://www.vice.com/en_us/article/939qbz/people-born-blind-are-mysteriously-protected-from-schizophrenia  


"People Who experience mood swings, fear, voices and visions"