diff --git a/code/__DEFINES/mobs.dm b/code/__DEFINES/mobs.dm
index e1f2b65541b..c76e170ee4b 100644
--- a/code/__DEFINES/mobs.dm
+++ b/code/__DEFINES/mobs.dm
@@ -267,6 +267,12 @@
 #define	REAGENTS_METABOLISM 0.4	//How many units of reagent are consumed per tick, by default.
 #define REAGENTS_EFFECT_MULTIPLIER (REAGENTS_METABOLISM / 0.4)	// By defining the effect multiplier this way, it'll exactly adjust all effects according to how they originally were with the 0.4 metabolism
 
+// Eye protection
+#define FLASH_PROTECTION_SENSITIVE -1
+#define FLASH_PROTECTION_NONE 0
+#define FLASH_PROTECTION_FLASH 1
+#define FLASH_PROTECTION_WELDER 2
+
 // Roundstart trait system
 
 #define MAX_QUIRKS 6 //The maximum amount of quirks one character can have at roundstart
diff --git a/code/modules/antagonists/changeling/powers/augmented_eyesight.dm b/code/modules/antagonists/changeling/powers/augmented_eyesight.dm
index 04922a25c8b..19f211014a8 100644
--- a/code/modules/antagonists/changeling/powers/augmented_eyesight.dm
+++ b/code/modules/antagonists/changeling/powers/augmented_eyesight.dm
@@ -14,7 +14,7 @@
 	..()
 	var/obj/item/organ/eyes/E = user.getorganslot(ORGAN_SLOT_EYES)
 	if (E)
-		E.flash_protect = 2 //Adjust the user's eyes' flash protection
+		E.flash_protect = FLASH_PROTECTION_WELDER //Adjust the user's eyes' flash protection
 		to_chat(user, "We adjust our eyes to protect them from bright lights.")
 	else
 		to_chat(user, "We can't adjust our eyes if we don't have any!")
@@ -27,12 +27,12 @@
 	if(E)
 		if(!active)
 			E.sight_flags |= SEE_MOBS | SEE_OBJS | SEE_TURFS //Add sight flags to the user's eyes
-			E.flash_protect = -1 //Adjust the user's eyes' flash protection
+			E.flash_protect = FLASH_PROTECTION_SENSITIVE //Adjust the user's eyes' flash protection
 			to_chat(user, "We adjust our eyes to sense prey through walls.")
 			active = TRUE //Defined in code/modules/spells/spell.dm
 		else
 			E.sight_flags ^= SEE_MOBS | SEE_OBJS | SEE_TURFS //Remove sight flags from the user's eyes
-			E.flash_protect = 2 //Adjust the user's eyes' flash protection
+			E.flash_protect = FLASH_PROTECTION_WELDER //Adjust the user's eyes' flash protection
 			to_chat(user, "We adjust our eyes to protect them from bright lights.")
 			active = FALSE
 		user.update_sight()
@@ -47,6 +47,6 @@
 		if (active)
 			E.sight_flags ^= SEE_MOBS | SEE_OBJS | SEE_TURFS
 		else
-			E.flash_protect = 0
+			E.flash_protect = FLASH_PROTECTION_NONE
 		user.update_sight()
 	..()
diff --git a/code/modules/antagonists/clockcult/clock_items/judicial_visor.dm b/code/modules/antagonists/clockcult/clock_items/judicial_visor.dm
index f392e66b619..ad8ad11a29d 100644
--- a/code/modules/antagonists/clockcult/clock_items/judicial_visor.dm
+++ b/code/modules/antagonists/clockcult/clock_items/judicial_visor.dm
@@ -6,7 +6,7 @@
 	icon_state = "judicial_visor_0"
 	item_state = "sunglasses"
 	resistance_flags = FIRE_PROOF | ACID_PROOF
-	flash_protect = 1
+	flash_protect = FLASH_PROTECTION_FLASH
 	var/active = FALSE //If the visor is online
 	var/recharging = FALSE //If the visor is currently recharging
 	var/obj/effect/proc_holder/judicial_visor/blaster
diff --git a/code/modules/antagonists/cult/cult_items.dm b/code/modules/antagonists/cult/cult_items.dm
index d7844056737..f9cb83d1869 100644
--- a/code/modules/antagonists/cult/cult_items.dm
+++ b/code/modules/antagonists/cult/cult_items.dm
@@ -455,7 +455,7 @@
 	name = "zealot's blindfold"
 	icon_state = "blindfold"
 	item_state = "blindfold"
-	flash_protect = 1
+	flash_protect = FLASH_PROTECTION_FLASH
 
 /obj/item/clothing/glasses/hud/health/night/cultblind/equipped(mob/living/user, slot)
 	..()
diff --git a/code/modules/clothing/clothing.dm b/code/modules/clothing/clothing.dm
index 99ae137d199..5d14889318b 100644
--- a/code/modules/clothing/clothing.dm
+++ b/code/modules/clothing/clothing.dm
@@ -4,7 +4,8 @@
 	max_integrity = 200
 	integrity_failure = 80
 	var/damaged_clothes = 0 //similar to machine's BROKEN stat and structure's broken var
-	var/flash_protect = 0		//What level of bright light protection item has. 1 = Flashers, Flashes, & Flashbangs | 2 = Welding | -1 = OH GOD WELDING BURNT OUT MY RETINAS
+	///What level of bright light protection item has.
+	var/flash_protect = FLASH_PROTECTION_NONE
 	var/tint = 0				//Sets the item's level of visual impairment tint, normally set to the same as flash_protect
 	var/up = 0					//but separated to allow items to protect but not impair vision, like space helmets
 	var/visor_flags = 0			//flags that are added/removed when an item is adjusted up/down
diff --git a/code/modules/clothing/glasses/_glasses.dm b/code/modules/clothing/glasses/_glasses.dm
index e331af8ee9a..2d51576abfd 100644
--- a/code/modules/clothing/glasses/_glasses.dm
+++ b/code/modules/clothing/glasses/_glasses.dm
@@ -74,7 +74,7 @@
 	icon_state = "nvgmeson"
 	item_state = "nvgmeson"
 	darkness_view = 8
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_INVISIBLE
 	glass_colour_type = /datum/client_colour/glass_colour/green
 
@@ -111,7 +111,7 @@
 	icon_state = "night"
 	item_state = "glasses"
 	darkness_view = 8
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_INVISIBLE
 	glass_colour_type = /datum/client_colour/glass_colour/green
 
@@ -192,7 +192,7 @@
 	icon_state = "sun"
 	item_state = "sunglasses"
 	darkness_view = 1
-	flash_protect = 1
+	flash_protect = FLASH_PROTECTION_FLASH
 	tint = 1
 	glass_colour_type = /datum/client_colour/glass_colour/gray
 	dog_fashion = /datum/dog_fashion/head
@@ -260,7 +260,7 @@
 	item_state = "welding-g"
 	actions_types = list(/datum/action/item_action/toggle)
 	materials = list(/datum/material/iron = 250)
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	tint = 2
 	visor_vars_to_toggle = VISOR_FLASHPROTECT | VISOR_TINT
 	flags_cover = GLASSESCOVERSEYES
@@ -275,7 +275,7 @@
 	desc = "Covers the eyes, preventing sight."
 	icon_state = "blindfold"
 	item_state = "blindfold"
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	tint = 3
 	darkness_view = 1
 	dog_fashion = /datum/dog_fashion/head
@@ -328,7 +328,7 @@
 	item_state = "glasses"
 	vision_flags = SEE_MOBS
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_VISIBLE
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 	glass_colour_type = /datum/client_colour/glass_colour/red
 
 /obj/item/clothing/glasses/thermal/emp_act(severity)
diff --git a/code/modules/clothing/glasses/hud.dm b/code/modules/clothing/glasses/hud.dm
index 8a1ca1cb7f9..b3228a545d6 100644
--- a/code/modules/clothing/glasses/hud.dm
+++ b/code/modules/clothing/glasses/hud.dm
@@ -55,7 +55,7 @@
 	icon_state = "healthhudnight"
 	item_state = "glasses"
 	darkness_view = 8
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_VISIBLE
 	glass_colour_type = /datum/client_colour/glass_colour/green
 
@@ -64,7 +64,7 @@
 	desc = "Sunglasses with a medical HUD."
 	icon_state = "sunhudmed"
 	darkness_view = 1
-	flash_protect = 1
+	flash_protect = FLASH_PROTECTION_FLASH
 	tint = 1
 	glass_colour_type = /datum/client_colour/glass_colour/blue
 
@@ -81,7 +81,7 @@
 	icon_state = "diagnostichudnight"
 	item_state = "glasses"
 	darkness_view = 8
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_VISIBLE
 	glass_colour_type = /datum/client_colour/glass_colour/green
 
@@ -90,7 +90,7 @@
 	desc = "Sunglasses with a diagnostic HUD."
 	icon_state = "sunhuddiag"
 	item_state = "glasses"
-	flash_protect = 1
+	flash_protect = FLASH_PROTECTION_FLASH
 	tint = 1
 
 /obj/item/clothing/glasses/hud/security
@@ -104,7 +104,7 @@
 /obj/item/clothing/glasses/hud/security/chameleon
 	name = "chameleon security HUD"
 	desc = "A stolen security HUD integrated with Syndicate chameleon technology. Provides flash protection."
-	flash_protect = 1
+	flash_protect = FLASH_PROTECTION_FLASH
 
 	// Yes this code is the same as normal chameleon glasses, but we don't
 	// have multiple inheritance, okay?
@@ -135,7 +135,7 @@
 	desc = "Sunglasses with a security HUD."
 	icon_state = "sunhudsec"
 	darkness_view = 1
-	flash_protect = 1
+	flash_protect = FLASH_PROTECTION_FLASH
 	tint = 1
 	glass_colour_type = /datum/client_colour/glass_colour/darkred
 
@@ -144,7 +144,7 @@
 	desc = "An advanced heads-up display that provides ID data and vision in complete darkness."
 	icon_state = "securityhudnight"
 	darkness_view = 8
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_VISIBLE
 	glass_colour_type = /datum/client_colour/glass_colour/green
 
diff --git a/code/modules/clothing/head/hardhat.dm b/code/modules/clothing/head/hardhat.dm
index fb9ce5db6f5..cdea6f1fb2a 100644
--- a/code/modules/clothing/head/hardhat.dm
+++ b/code/modules/clothing/head/hardhat.dm
@@ -98,7 +98,7 @@
 	brightness_on = 3 //Needs a little bit of tradeoff
 	dog_fashion = null
 	actions_types = list(/datum/action/item_action/toggle_helmet_light, /datum/action/item_action/toggle_welding_screen)
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	tint = 2
 	flags_inv = HIDEEYES | HIDEFACE
 	flags_cover = HEADCOVERSEYES | HEADCOVERSMOUTH
diff --git a/code/modules/clothing/head/misc_special.dm b/code/modules/clothing/head/misc_special.dm
index f08cdce493f..e92dbbbad3a 100644
--- a/code/modules/clothing/head/misc_special.dm
+++ b/code/modules/clothing/head/misc_special.dm
@@ -20,7 +20,7 @@
 	flags_cover = HEADCOVERSEYES | HEADCOVERSMOUTH
 	item_state = "welding"
 	materials = list(/datum/material/iron=1750, /datum/material/glass=400)
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	tint = 2
 	armor = list("melee" = 10, "bullet" = 0, "laser" = 0,"energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 100, "acid" = 60)
 	flags_inv = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE
diff --git a/code/modules/clothing/masks/gasmask.dm b/code/modules/clothing/masks/gasmask.dm
index 1a563bba846..02c34983311 100644
--- a/code/modules/clothing/masks/gasmask.dm
+++ b/code/modules/clothing/masks/gasmask.dm
@@ -18,7 +18,7 @@
 	desc = "A gas mask with built-in welding goggles and a face shield. Looks like a skull - clearly designed by a nerd."
 	icon_state = "weldingmask"
 	materials = list(/datum/material/iron=4000, /datum/material/glass=2000)
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	tint = 2
 	armor = list("melee" = 10, "bullet" = 0, "laser" = 0,"energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 100, "acid" = 55)
 	actions_types = list(/datum/action/item_action/toggle)
diff --git a/code/modules/clothing/spacesuits/_spacesuits.dm b/code/modules/clothing/spacesuits/_spacesuits.dm
index f1cc446400f..1cbc765a642 100644
--- a/code/modules/clothing/spacesuits/_spacesuits.dm
+++ b/code/modules/clothing/spacesuits/_spacesuits.dm
@@ -15,7 +15,7 @@
 	min_cold_protection_temperature = SPACE_HELM_MIN_TEMP_PROTECT
 	heat_protection = HEAD
 	max_heat_protection_temperature = SPACE_HELM_MAX_TEMP_PROTECT
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	strip_delay = 50
 	equip_delay_other = 50
 	flags_cover = HEADCOVERSEYES | HEADCOVERSMOUTH | PEPPERPROOF
diff --git a/code/modules/clothing/spacesuits/hardsuit.dm b/code/modules/clothing/spacesuits/hardsuit.dm
index b110ccb1351..3643add9219 100644
--- a/code/modules/clothing/spacesuits/hardsuit.dm
+++ b/code/modules/clothing/spacesuits/hardsuit.dm
@@ -435,7 +435,7 @@
 	icon_state = "hardsuit0-medical"
 	item_state = "medical_helm"
 	hardsuit_type = "medical"
-	flash_protect = 0
+	flash_protect = FLASH_PROTECTION_NONE
 	armor = list("melee" = 30, "bullet" = 5, "laser" = 10, "energy" = 5, "bomb" = 10, "bio" = 100, "rad" = 60, "fire" = 60, "acid" = 75)
 	clothing_flags = STOPSPRESSUREDAMAGE | THICKMATERIAL | SCAN_REAGENTS | SNUG_FIT
 
diff --git a/code/modules/clothing/spacesuits/miscellaneous.dm b/code/modules/clothing/spacesuits/miscellaneous.dm
index 554ec45822c..4ffcc6a0536 100644
--- a/code/modules/clothing/spacesuits/miscellaneous.dm
+++ b/code/modules/clothing/spacesuits/miscellaneous.dm
@@ -260,7 +260,7 @@ Contains:
 	icon_state = "space"
 	item_state = "space"
 	desc = "A lightweight space helmet with the basic ability to protect the wearer from the vacuum of space during emergencies."
-	flash_protect = 0
+	flash_protect = FLASH_PROTECTION_NONE
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0,"energy" = 0, "bomb" = 0, "bio" = 100, "rad" = 20, "fire" = 50, "acid" = 65)
 
 /obj/item/clothing/head/helmet/space/freedom
diff --git a/code/modules/clothing/spacesuits/plasmamen.dm b/code/modules/clothing/spacesuits/plasmamen.dm
index 08fc1638a25..2d1d6be5e44 100644
--- a/code/modules/clothing/spacesuits/plasmamen.dm
+++ b/code/modules/clothing/spacesuits/plasmamen.dm
@@ -41,7 +41,7 @@
 	icon_state = "plasmaman-helm"
 	item_state = "plasmaman-helm"
 	strip_delay = 80
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	tint = 2
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 100, "rad" = 0, "fire" = 100, "acid" = 75)
 	resistance_flags = FIRE_PROOF
diff --git a/code/modules/surgery/organs/eyes.dm b/code/modules/surgery/organs/eyes.dm
index c4720f570c9..c7f52514cbf 100644
--- a/code/modules/surgery/organs/eyes.dm
+++ b/code/modules/surgery/organs/eyes.dm
@@ -25,7 +25,7 @@
 	var/eye_color = "" //set to a hex code to override a mob's eye color
 	var/eye_icon_state = "eyes"
 	var/old_eye_color = "fff"
-	var/flash_protect = 0
+	var/flash_protect = FLASH_PROTECTION_NONE
 	var/see_invisible = SEE_INVISIBLE_LIVING
 	var/lighting_alpha
 	var/no_glasses
@@ -155,7 +155,7 @@
 	eye_color = "FC0"
 	sight_flags = SEE_MOBS
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_VISIBLE
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 	see_in_dark = 8
 
 /obj/item/organ/eyes/robotic/flashlight
@@ -164,7 +164,7 @@
 	eye_color ="fee5a3"
 	icon = 'icons/obj/lighting.dmi'
 	icon_state = "flashlight_eyes"
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 	tint = INFINITY
 	var/obj/item/flashlight/eyelight/eye
 
@@ -192,7 +192,7 @@
 /obj/item/organ/eyes/robotic/shield
 	name = "shielded robotic eyes"
 	desc = "These reactive micro-shields will protect you from welders and flashes without obscuring your vision."
-	flash_protect = 2
+	flash_protect = FLASH_PROTECTION_WELDER
 
 /obj/item/organ/eyes/robotic/shield/emp_act(severity)
 	return
@@ -379,7 +379,7 @@
 /obj/item/organ/eyes/moth
 	name = "moth eyes"
 	desc = "These eyes seem to have increased sensitivity to bright light, with no improvement to low light vision."
-	flash_protect = -1
+	flash_protect = FLASH_PROTECTION_SENSITIVE
 
 /obj/item/organ/eyes/snail
 	name = "snail eyes"