front door

One of my neighbours replaced her front door with what was supposed to be a better one – a ‘solid’ double glazed door. When I asked her if she was happy with the result, she pointed out a few problems, but she seemed very puzzled with one thing… “With all the glass why is there a ‘peep hole’ on the door?” All I could do was laugh. 🙂 But honestly WHY?

Is this just bad design? Do they just follow the ‘template’ and put it there because that is how they have always designed front doors?