Why are corpses blinded with a cloth?


In the Manga, in [The Ship Voyage
arc](http://kuroshitsuji.wikia.com/wiki/Ship_Voyage_Arc), the corpses on
Campania are blinded by a cloth. Ciel speculates that they can't hear or see.
But if the cloth is removed, will they be able to see? Or is it just for show?
To depict that the corpses can't see? Any particular reason? Or the Mangaka
just wanted to design the characters that way?

