So I was talking to this blind person and he said that he hits his head a lot and other blind people hit their head a lot

He claimed if you where glasses it is less bad when you hit your head. Maybe they are supposed to protect the eyes. Although personally I would imagine having the glasses frame slammed into your eyes could make it worse.

He said he did not wear a helmet because all the other blind people would make fun of him

How could they see the helmet to know to make fun of him?