Serotonin is associated with the occipital lobes and vision.
Makes sense
DMT produces far out visuals
Serotonin is effected as a primary target for all psychedelics
Interesting.
One guy at /r/EyeFloaters took an antidepressant and said it made his floaters less visible. I think it was an SSRI. This would confirm the hypothesis that the psilocybin interferes with the brain's ability to filter the floaters out, rather than causing new floaters to form.