Optics of perceived shadows on LCD monitor After changing my desktop wallpaper on my LED-lit LCD monitor to one with a dark corner, I started seeing shadows on where the clock widget is while looking sideways at the screen. These shadows move with the turn of my head and disappear when I look straight. My question has two parts:


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*Is this normal with LCD screens or is it a result of the fact that I wear very thick glasses?

*Does this effect have a name, and where can I read more about it?


A diagram illustrating light propagation would be very much appreciated. 
Below is the image in question. I see dark blue shadows of the big numbers while looking sideways at them

 A: Lenses can exhibit chromatic aberration due to a color (wavelength) dependent index of refraction in the lens material. Chromatic aberration can cause the three colors from the red-green-blue (RGB) display to separate when viewed off the lens axis:

Left: on axis. Right: off axis.
In less pronounced cases, this might lead to a ghosting of images. Definitely causes me problems when I word in CAD programs and don't view the screen straight on.
A: I am hypothesizing based on the information you gave in the question and clarifying comments.
The fact that the distance between the "shadow" (or ghost) and the number increases with distance tells me that the shadow is produced by your eye+glasses, rather than the screen itself. Most likely, you are seeing reflections from the front/back surface of your glasses: these reflections would overlap with the image when you are looking straight at the source, and shift as you are looking from the side.
If that is correct, you would see a similar thing with street lights at night.
The reason you see this with the screen and not a piece of paper may be due to the contrast ratio - "light" on the screen vs "black" can be quite a large ratio, so even a faint "echo" of the number will be visible. In particular, the screen is usually brighter than other objects in the room (it has to be, in order to see things properly). By contrast, a print out may just not have the same contrast - and definitely doesn't usually have the brightness, since it is illuminated by the rest of the environment. Thus, the ghost would be much dimmer for the paper than for the screen.
