The bulk update request #9113 is pending approval.

mass update hypnotic_visor -> hypnotic_headgear
mass update hypno_goggles -> hypnotic_headgear
mass update hypnotic_helmet -> hypnotic_headgear
mass update hypnotic_mask -> hypnotic_headgear
mass update hypnotic_glasses -> hypnotic_headgear
create implication hypnotic_headgear (0) -> hypnotic_device (101)

Reason: There's a lot of mistagging among various tags relating to hypnotic headgear.

The tags for visors, goggles, helmets, masks, and glasses are all jumbled together, despite there being distinct form factors

This BUR first updates all relevant posts to use an encompassing hypnotic_headgear tag for the sake of searchability while tags are cleaned up.
The followup creates the necessary implications to hypnotic_headgear as well as the respective headgear related tags.
Edit: Followup BUR listed below

Alternatively, the visor/goggle/glasses/mask tags could be aliased away to one tag like hypnotic_facewear to avoid tag bloat, since they're generally similar form factor.

The bulk update request #9114 is pending approval.

create implication hypnotic_goggles (2) -> hypnotic_headgear (0)
create implication hypnotic_goggles (2) -> goggles (30909)
create implication hypnotic_visor (1491) -> hypnotic_headgear (0)
create implication hypnotic_visor (1491) -> visor (5334)
create implication hypnotic_helmet (41) -> hypnotic_headgear (0)
create implication hypnotic_helmet (41) -> helmet (30026)
create implication hypnotic_mask (18) -> hypnotic_headgear (0)
create implication hypnotic_mask (18) -> mask (48508)
create implication hypnotic_glasses (2) -> hypnotic_headgear (0)
create implication hypnotic_glasses (2) -> glasses (214312)

Reason: Followup for BUR #9113 topic #46029

Additionally wanted to add alias hypno_goggles -> hypnotic_goggles but it's being blocked by topic #45550

Disagreeing with several parts of this BUR.
First of all, topic #45550 makes the mass update for hypno_goggles completely unnecessary. hypnotic_goggles should also rather be aliased to hypnotic_visor than getting its own implications. (The one picture currently tagged as hypnotic_goggles might also be better suited for hypnotic_glasses.)

Second, mass updating these tags away just to give them implications afterwards doesn’t make sense. If they are distinct enough (like you said) we would need to re-add them to posts, so why not clean up the posts manually to begin with?

Also, why to hypnotic_headgear? The helmet is the only one of these tags I see actually being a type of headgear, the others are either eyewear or are too variable to always be called headgear (mask and visor).

If we want to avoid tag bloat why not make implications directly to hypnotic_device ? The tag is both good as an umbrella term and I found it useful for tagging the more niche/outlandish machines artists might come up with. This way we also get around the discussion if headgear/headwear counts as clothing or accessory.
I also want to add at this point that there can be an overlap between hypnotic_visor and hypnotic_helmet. A visor can be part of a helmet after all.