What is this device on the nose of an MD-11? In the following photo there is some sort of cover or opening (for an optical device I assume) on the nose cone.

What is this and what is the system behind it?



(link to source)
Enhanced flight vision system 

or a different angle

wiki says:


  An Enhanced flight vision system (EFVS, sometimes EVS) is an airborne system which provides an image of the scene and displays it to the pilot, in order to provide an image in which the scene and objects in it can be better detected.