I think it is "normal" for one to see an image the look at "too long" to be more-or-less imprinted in the mind. I've had some minor experience but nothing so vivid as you say.
I have a problem with trouble mares and the only thing I can conclude is the dreams are driven by fears of what might happen, but basically never have, in the awake world.
What doctor are you going to see? I have discussed my trouble mares with my cardiologist (the beta blockers he has prescribed could be a contributor), with my Primary Care, and briefly with a sleep specialist doctor I was examined by and I was found to suffer from mild obstructive sleep apnea - none had any real advice relative to trouble dreaming.. at least not as long as I get enough sleep to deal with the awake time I have without excessive tiredness.
Not much help, but just trying to relate.
I plan to see an ophthalmologist...I saw an optometrist for a check up. I described my images situation and he admitted he did not know of what I was talking about. I found that difficult to believe...that any eye specialist of any kind had not heard of this sort of issue. Now after reading all these posts I realize that it has been attributed to many things. I will report back after doctor's appointment. Had the 10 of diamonds this a.m.