Don't worry. The human eye/brain is very tolerant of non-uniform brightness as long as the change is gradual, which it is. You won't be able to detect the brightness non-uniformity unless it exceeds about 2:1, and you are nowhere near that. As to overall brightness, you could have an issue with 3D if that's an interest, but I think 2D probably will be fine.
1/19/11 at 7:51pm