Tetsuo Time

I just noticed today that my flat panel monitor is several shades lighter at the bottom than it is at the top and no matter what I do to adjust the monitor it's always the same. Is my monitor wearing out already? I read some old 17 inch apple studio displays have had an issue where the top of the screen got dim and people where having to send them in for service. This display isn't quite dim at the top at least yet but it is several shades darker than at the bottom. It's really noticable when I drag a window from the top of the screen to the bottom or have a two windows that have the same style open one at the top and one at the bottom. Does anyone have any advice for me? The display looks good but it just bugs me that I'm not getting uniform brightness from the top to bottom especially considering I do design work on this display.

I'm also kind of like could it be my monitor has always been like this and I hadn't been paying attention because I don't tend to use a theme like I am using now?