A World Without

What if everyone in the world was blind?

Kirk is a city where the monarchs that ruled over them had sight but the population was blind. The sighted gene would pop up in the population every so often, about every 100 years, and the monarchs would take those children and raise them as their own. They write in Braille using boulers, they're like fountain pens only with glue cartridges to create bumps instead of ink.