Screen suddenly gone a funny colour

Hello,

I was using my iPad Air 2 and all of a sudden the screen on the iPad became holographic making it hard to see what was on the screen. When on a white and black only screen the imagine is normal however watching videos and going on photos and apps makes the screen extremely difficult to watch. When looking closely you can also faintly see other screens I’ve previously been on, as though they’re layered on top of each other. I’ll attach a couple photos to explain what I mean.

just to note. The screen has no cracks at all and it hasn’t been dropped or anything like that.

Thank you, Amy