Pink eye is caused by the inflammation of the conjunctiva (which is the top most layer of the eye and the underside of the eyelid). That is caused by bacterial or viral infection or though an acute allergic reaction.
North Korea wants to make itself look more powerful that it really looks. This pressures the outside world to start trades with them so that they can receive more aid. They say that they are self-sufficient, but look at some documentaries, this is far from the truth. If memory serves correctly, South Korea has stopped or severely restricted their aid packages to the citizen's of North Korea due to a disagreement with a diplomatic document; this has impacted them quite a bit. This has left the government of N. Korea rather bitter.
You have to remember that we live in the information age. The agenda's of other people have one primary goal: To persuade people like you and me that their way of life and their actions are okay to do.