Status Updates From 盲人國度：從看的見到看不見的奇異旅程

How have I never thought about how the blind community interacts with physical currency?!? Change in the U. S. seems fairly straightforward, but what about the various bills? How do they distinguish each value from the others, especially given the sheer amount of bills from various years in circulation? I’m absolutely falling down a rabbit hole with this one.