Very good read on the latest research on brain changes with visual snow syndrome.
https://academic.oup.com/brain/article/143/4/1106/5811372?fbclid=IwAR1KJ197kKdEt-4eDlQQ1SpgE_fE9wXVksFSX2VE--Ym1yFVcivreN6VwBY