Tweak the code, adds a couple of ❄️ to make it work

code/modules/clothing/glasses/glasses.dm

@@ -284,11 +284,9 @@ BLIND     // can't see anything
 	if(toggleable && !user.incapacitated())
 		on = !on
 		if(on)
-			flash_protection = FLASH_PROTECTION_NONE
 			src.hud = hud_holder
 			to_chat(user, "You switch the [src] to HUD mode.")
 		else
-			flash_protection = initial(flash_protection)
 			src.hud = null
 			to_chat(user, "You switch \the [src] to flash protection mode.")
 		update_icon()

code/modules/mob/living/carbon/human/human.dm

@@ -677,6 +677,10 @@
 		number -= 1
 	if(istype(src.glasses, /obj/item/clothing/glasses/sunglasses))
 		number += 1
+	if(istype(src.glasses, /obj/item/clothing/glasses/sunglasses/sechud/toggle))
+		var/obj/item/clothing/glasses/sunglasses/sechud/toggle/S = src.glasses
+		if(!S.on)
+			number += 1
 	if(istype(src.glasses, /obj/item/clothing/glasses/welding))
 		var/obj/item/clothing/glasses/welding/W = src.glasses
 		if(!W.up)