sokko (englanniksi)

blind man's buff (s: children's game in which a blindfolded person tries to catch the other players)
blindman gloss|the blindfolded person in this game (s)
also called "It"}} (s)
Someone who is temporarily unable to see (s)
either due to being blinded or because something essential is hidden from that person (s)
as in a "blind test" (s)