I actually think that this is about someonewho cheated on their partner, and the partner who was blind, is given eyesight to see the betrayal of the person that they loved.
I think the parental references have something to do with the fact that your parents try and teach you what people are like, and how things can go wrong in relationships.
I also guess that the narrator feels isolated because everyone knew his/her partner was cheating on them and no one told him. 'My father told me, that you're always lonely when they're all laughing at you.'
I actually think that this is about someonewho cheated on their partner, and the partner who was blind, is given eyesight to see the betrayal of the person that they loved.
I think the parental references have something to do with the fact that your parents try and teach you what people are like, and how things can go wrong in relationships. I also guess that the narrator feels isolated because everyone knew his/her partner was cheating on them and no one told him. 'My father told me, that you're always lonely when they're all laughing at you.'