Blinding your enemy as an example is an old Eastern Roman/Byzantine tradition....See Emperor Basil, the Bulgar Slayer.
Thanks for the mention. Seems like a terrible thing to do to any society. One day the hostilities cease, and those blinded people have to be looked after.
Now this isn’t completely true, because blind people do function in society, but it’s still a terrible waste of future resources.
It’s inhumane on a number of levels.