How do I tighten my wheel house glasses

[Craig55]

Hi how do I tighten my wheel house glasses, they have come loose, there is no screws?

 

[MicahS]

Interesting. The hollowpoint hinge is supposed to prevent them from getting loose by way of a hidden spring cam.

I'd bring them back to a store if that's the case

 

[Craig55]

Ok thanks for your help. Much appreciated