Display Screen malfunction???-HELP!!!

I am a new mac user and still pretty unfamiliar with the operating system. Recently, the right quarter or so of my computer screen has become blurry. When a window is open, the blur appears on top of it, and when I watch a movie, the blurry area either turns black or what appears to be hundreds of horizontal lines appear in that portion of my screen.

Has anyone experienced this problem? Can anyone offer any suggestions on how to fix this issue?

Thank you