I dont think any physical problem can cause this surely? Can it?

I have just once had something like this, I was wide awake going to sleep with the landing light on, I closed my eyes, opened them to see almost touchable numbers above me, moving from one side of the room to another. Its like they were projected. White fuzzy numbers and mathmatical symbols. No matter if I shut my eyes and opened them they were there. I never found out what they were and Ive only ever told 3 people.No I wasnt asleep.

I reguarly wake and see remnants of a dream semi transparent over real life. You guys are way more vivid. Wow.