This is what it is like not seeing what impact diffuse design has in our lives. A limited field of vision. Actually, as happens with dog Blacky in this picture, this entails a limited field of action (the device is supposed to prevent him from scratching his head; limited field of vision is just a by-product.) At the same time, home-grown improvements are always possible, as the implement shows.

In the end, ours is a plea for reflective observation.