The camera lense had become very scratched and my picture world turned to fog and blurs.
With new cover in hand, 2 screws came out, old cover slid off, and new cover slid on. In less than 2 minutes my pictures were clear and sharp.
I bought the clear back cover because it was different and makes for a great show and tell. In order to protect the camera lense from becoming scratched again, you need to keep a case around your iPhone. So, show and tell takes a little more effort, but It will keep your captured world clear.