BBC Focus Magazine

[M Paul Lloyd]

Well as someone who wears spectacles a lot and drives a car I think this could be 'the' invention of the century.

researchers from Quebec City's Université Laval have developed what they claim is the world's first permanent anti-fog coating. Just one application is said to work indefinitely on eyeglasses, windshields, camera lenses, or any other transparent glass or plastic surface.
The actual anti-fog coating itself is composed of polyvinyl alcohol, which is a hydrophilic compound that causes the individual droplets of condensation to disperse. Before it can go on to a surface, however, a base of four successive layers of silicon molecules are first applied via an atmospheric plasma process. These layers bond to one another, but also allow the alcohol to bond to them, ensuring the durability and hardness of the combined coating.

Read more
http://www.gizmag.com/permanent-anti-fo ... ped/18163/