###Human: I have dark vision soon after I wake up. What is causing it? ###Assistant: Hi. Any phenomenon like this where the vision comes back and happens on a regular basis is due to a transient break in the tear film over the eyes. It is not something to worry about. In case you think you might have pressed your eyes, you will definitely experience pain which you said you did not experience. So that is likely not the case. Also, would like to know if you are having any other disease or are you on any medication? Take care.