The blind woman’s hands graze the young man’s face after he urges her to do so. He eggs her on, saying she needs to feel his beauty. To him, it’s the only way that she’ll know what he looks like. Perhaps to an abled audience, this makes sense.
A scene later, and the blind woman finds a corpse in an alley. She feels the corpse’s face, and knows without a shred of doubt that it is her friend, whose face she just touched at the beginning of the episode.