When you take your Oculus Rift out of the box it's normal to not fit perfectly. You can have same problems with several things but it's not difficult to adjust them. This steps will help you in solving the possible problems you can have with the lenses of your headset. The process is very simple, just follow this simple steps, and on the end you will have the view you want.
Step 1. Look on the underside of your Oculus Rift and you will easily see the lens slider.
Step 2.After you have located the lens slider just slide it and push in, in both directions. With this step you will adjust the distance between the lenses,
Step 3.When you enter into VR world you will need to move the lens slider until you can see that the image is clear.
When you finish this steps your view will fit perfectly and you can enjoy your VR experience fully.