Many have used the words for an eye an eye to show an “extreme verse” in the holy book but when what looks deeper they might see something new. For when you inflict punishment on someone they see things in a much harsher light which should then become translucent to the one who acted in such an evil way. Before said criminal is released from their punishment they should fully see the pain they caused and feel at as if they themselves have had it occur to them. Then G-D willing after this revealation they will be less likely to act in such an evil way in the future. An eye for an eye sometimes what appears to be right in front of you is much deeper then you think.