Specifically, the helmet becomes invisible when looking at it head on (or slightly off head on, maybe 25 degrees to each side) from close range, such as when viewing the pc from closer 3rd person or when talking to an npc who is wearing it.

I have it set as a circlet, though setting it to hair as well like a normal helmet did not make a difference. I would appreciate any ideas or suggestions as to what the problem might be and how to fix it. I am not sure if it is a CK or Nifskope issue, but I figured with all the knowledge floating around here someone might be able to pinpoint the issue either way. Thanks in advance.

Solved. Was an issue with the NiNode it was attached to being too far forward after I resized the mesh, moving it further back in Nifskope fixed it.