User blog comment:Haki73/Zoros eye?/@comment-98.193.106.136-20111107080232/@comment-74.98.177.84-20120208065209

Pirates didn't wear Eye Patches because they were just missing an eye. They also wore them for when they had to fight inside a ship. They just switched the patch over to the other side so they had night vision ready to go. I agree that its a pirate based and as far as I know few pirates wore robes.