While I am opposed to sharia justice in general, this is one of those instances where the 'rough justice' aspect of it seems appropriate (although it still isn't quite commensurate, since apparently, i.) he won't go through the same level of pain as his victim, and ii.) other than losing his sight he apparently won't be disfigured). I am not arguing that inflicting that level of cruelty would be appropriate either.
While the justice system in my country needs a lot of reform, I personally still believe that certain crimes require society to punish the perpetrator in a commensurate fashion, which is why I have no problem with the death penalty for particularly heinous crimes. Of course, that makes me a minority out here and is typically ascribed to my being American and therefore, somehow unevolved in my thinking. Too bad.