iPhone camera went all blurry all of sudden iPhone 5

I take pictures often with Instagram and SnapChat but yesterday I wanted to take a picture and the back camera is all blurry all the sudden. I googled this and it seems others have had the same issue but I could'nt discover a solution. It's able to focus on close ups but cant focus any farther than that. I don''t feel its a hardware problem I feel like its a software issue which controls the camera mechanism.