I've had my iMac for a year and a half, so it's not old. Today I booted it up and found that the display has suddenly gone quite blurry in places. When I put my mouse arrow to the far right of the screen, the whole display moves slightly to the left. I tried restarting and then shutting down and booting it back up, but it hasn't helped at all. I was just wondering if anyone has ever had anything like this and knows of any possible solutions?