It is good you ask his forgiveness but do not feel bad. It would have been your eye that got blind. You acted to protect yourself which is called self-defense. Our society do not understand women's pain. He shouldn't have cheated and beaten you. I am glad you are not living with him anymore. Another advice for you is, unable to get pregnant after using contraception is normal, so do think you cannot get pregnant. Move on and start a new life and be strong!