I read up on Sehanine Moonbow in Mordenkainen’s Tome of Foes, and there’s a brief reference to the elven phenomenon of having a moonbow in your vision. There was also another reference in Sword Coast Adventurer’s Guide to it. Is having them appear in your vision/ Supposed to be physically blinding, or is it more like "worldly things are about to mean a whole lot less to me because I could die any minute"?

— Jon Forel (@Jon_4L) March 31, 2019

No, it's not physically blinding; you can see through it. And clergy and faithful of Sehanine who see the rainbow can also still see normally.#Realmslore

— Ed Greenwood (@TheEdVerse) March 31, 2019