- A faint multi-tonal background "hiss", only apparent during silence, never goes away but is quite relaxing. I'm hesitant to even call it tinnitus - Visual snow. I have early memories from at least 5 or 6, staring at the blue sky and noticing it's not pure (I see blue as everyone else, but with a very transparent layer of static)
I have attributed it to something "off" in the sensory filtering part of my brain
There's more details further in the article[1].
[1] https://www.medrxiv.org/content/10.1101/2025.06.20.25329961v...