Thanks for posting! Yeah it’s very difficult to explain to others, and I hope that the website helps family/friends to understand.
Hmm, if your symptoms started directly after your trip you may have Hallucinogen Persistent Perception Disorder (HPPD), which is a similar but distinct condition to VS.
To be honest, despite my best efforts the forum is quite dead on here. You might like to join the Facebook group, which is a lot more active.
Do not worry, you will not go blind from VS or HPPD. Nobody has become completely blind from it. In very rare cases people become legally blind, but I cannot stress enough that that is rare.