I love and hate recommending this kind of movie. I love it because it will have such a dramatic impact on your lives. I hate it because I can’t really tell you anything about it beforehand.
All I can really say is that it is a film about people who suddenly go blind and about the world which this particular and peculiar change creates. Rest assured it will, like any well crafted piece of art, allow you insights heretofore unobtainable.
Don’t hesitate. I know a good tale when I see one.