The Blind Swordsman is a massive trope in fantasy literature. Take a look at David Carradine’s character in Circle of Iron for an archetypal example. It’s a staple in many kung fu movies - the Master uses their hyper developed senses for sounds and for movements in the air to sense and react to their enemies. Or take Luke Skywalker fighting the drone with his eyes covered by using the Force. Hodr was the blind son of Odin.

Blindness also occurs throughout mythic traditions, sometimes as punishment by the gods. It occurs in Greek and Jewish myths. The witch-woman in Hawk the Slayer was blind (played by the great Patricia Quinn, who also starred as Magenta in Rocky Horror).

I think it makes perfect thematic sense to include blindness in characters. A blind beggar, a blind prophet, or a blind samurai are all staples of the fantasy tradition. I’d actually love it if we had to work out a player character who is blind, but that would take a fair amount of effort. I think the payoff would be remarkable and memorable, though.