Plith.

He closed his eyes. Finally, he could see. He had felt blind his whole life, trying to see with his eyes open. Not even once had he thought to attempt to close his eyes. The difference was magical. This type of seeing was different though. He could no longer see people, places, or things around him, but he could see versions of these things when their eyes were closed as well. They were slightly difficult to make out at first, because he was not used to seeing things without light or easily identifiable shapes. He now how to train himself to see vague indeterminant beings with no characteristics or signature features. Why his sense of smell and taste were helpful at times, this new realm he entered required a completely new sense he had never dealt with before. This new sense was his “plith”. It helped him interact with other non-seeing beings in the closed realm. Now, he walks around and goes through life with his eyes closed. He likes to see life better this way.