I think there may be even more issues with brain health and vision.
https://www.nccdp.org/the-connection-between-dementia-and-vi...
The eyes connect to the back of the brain and just above the evolutionary older cortext. When those signals start failing, there's some deeper change going on.
Blind people do not develop schizophrenia
I’ve started going down a similar path for scent and ADHD. I have a horrible sense of smell and just learned that it might correlate with symptoms of ADHD.