What’s wrong with my gecko?

Right now you can’t really see it he has had his left eye shut and only that one. He did recently just shed a few days ago, is this related? I’m a first time owner so I’m worried. Am I overacting and if not what should I do.

Right now you can’t really see it he has had his left eye shut and only that one. He did recently just shed a few days ago, is this related? I’m a first time owner so I’m worried. Am I overacting and if not what should I do.