system
Given the following post, respond as if you're commenting on Reddit:
human
[General Sci-Fi] Is there a name for helmets that have no visor or facial glass?

As an example, I'm referring to helmets like the ones in Destiny 2 that don't have any sort of visor, and no glass. They only use optics and an advanced hud inside the helmet.

Another prime example is the helmets seen in Warframe. (I'm aware that those are frames and not suits.)

I am trying to design one of my own but I want to look at lots of pictures of these specific kinds of helmets to get more ideas, and having something that looks a little more UNSC as opposed to the more sooth and rounded versions like we see in Warframe, but Googling "Sci fi helmet with no visor" isn't really getting me anywhere.

I also tried to Google if there was a name for that kind of thing, and sadly Halo doesn't offer a lot of helmets without visors either. 

Does anyone know the name of a helmet like that, or a better term for it when searching on Google?
gpt
I think it's just a helmet.

In these Sci-fi universes, they've likely developed materials stronger than bulletproof glass/polycarbonate visors and with the advanced tech, they can fit a wide array of sensors and HUD elements into the viewing screen or project them directly into the wearers eyes, kinda like Google glass did. 

End result is full 360 protection to the head with no weak points, and some very useful tech elements built in.

In the Destiny universe, they also have space magic. Im sure the Light helps "enchant" some of the exotic helmets (warlock hoods) specifically. Most of the Hunter Cowls and Titan helms have eyeslits akin to what Tony stark has in his iron man armor, and he also has HUD elements.