Does a crack on my iphone camera come the apple warrantee?

My iphone5 has a really annoying purple crack on the camera lens. It doesn't cover the whole camera but it is quite noticeable. Will apple fix or replace it?

Yes until you haven't done any damage to it.
it you wantedly dropped warrenty maybe void

If there's a physical damage on the phone due to negligence, then it voids the warranty.

Any kind of cracks, scratches etc are not covered under the manufacturers warranty as they are either caused by accidental damage or excessive wear & tear.

Apple could repair it for you, but it would cost around £150+