Today I started getting blurred readings on the viewfinder of my nikon d5000?

The image in my viewfinder (Nikon D5000) including the digital display in the viewfinder is blurred. Also the autofocus is not working unless i use live-view.

Even when I take-off the lens (Nikon 18-105 VR) the image in my viewfinder is blurred including the readings display.

There should be a + - adjustment on the view-finder lens (where you put your eye). Turn it one way and/or the other until the display is sharp.

The viewfinder should indeed clear up if you use the dioptre wheel next to it. The AF issues needs some clarification. Does anything at all happen and on which position is the AF/MF switch are things you need to clarify.