So... gonna guess how this goes...
MC goomba-stomps that noble, he eventually puts back focus on the younger brother, who is probably still on the ground unconscious. And considering that the MC noted doing recovery magic wrong could screw up the nervous system, this is probably what happened, and the younger brother is expected to not wake up. Queue the MC doing recovery magic and doing it right. 'Please forgive me,' 'you are truly master,' 'how the hell can you do that with such unfortunate eyes,' etc..