blindness
「盲」 has another reading with different meanings.
blindness; blind person
盲の方を駅まで案内した。
I guided a blind person to the station.
盲導犬と一緒に歩いていた。
They were walking with a guide dog.
盲の状態でも音で周りがわかるらしい。
It seems you can tell your surroundings by sound even when blind.