diff --git a/code/__defines/mobs.dm b/code/__defines/mobs.dm
index f4dc7d5d0d..8c7acf05a2 100644
--- a/code/__defines/mobs.dm
+++ b/code/__defines/mobs.dm
@@ -147,6 +147,7 @@
 #define O_BRAIN    "brain"
 #define O_LIVER    "liver"
 #define O_KIDNEYS  "kidneys"
+#define O_APPENDIX "appendix"
 #define O_PLASMA   "plasma vessel"
 #define O_HIVE     "hive node"
 #define O_NUTRIENT "nutrient vessel"
diff --git a/code/game/objects/items/weapons/autopsy.dm b/code/game/objects/items/weapons/autopsy.dm
index d9bd30e788..c17d8ba650 100644
--- a/code/game/objects/items/weapons/autopsy.dm
+++ b/code/game/objects/items/weapons/autopsy.dm
@@ -3,7 +3,7 @@
 //please preference put stuff where it's easy to find - C
 
 /obj/item/weapon/autopsy_scanner
-	name = "autopsy scanner"
+	name = "biopsy scanner"
 	desc = "Extracts information on wounds."
 	icon = 'icons/obj/autopsy_scanner.dmi'
 	icon_state = ""
diff --git a/code/modules/mob/hear_say.dm b/code/modules/mob/hear_say.dm
index bd06a63cc9..f925c32b79 100644
--- a/code/modules/mob/hear_say.dm
+++ b/code/modules/mob/hear_say.dm
@@ -59,7 +59,7 @@
 		if(client.prefs.toggles & CHAT_GHOSTEARS && speaker in view(src))
 			message = "<b>[message]</b>"
 
-	if(sdisabilities & DEAF || ear_deaf)
+	if((sdisabilities & DEAF) || ear_deaf)
 		if(!language || !(language.flags & INNATE)) // INNATE is the flag for audible-emote-language, so we don't want to show an "x talks but you cannot hear them" message if it's set
 			if(speaker == src)
 				src << "<span class='warning'>You cannot hear yourself speak!</span>"
@@ -187,7 +187,7 @@
 		formatted = language.format_message_radio(message, verb)
 	else
 		formatted = "[verb], <span class=\"body\">\"[message]\"</span>"
-	if(sdisabilities & DEAF || ear_deaf)
+	if((sdisabilities & DEAF) || ear_deaf)
 		if(prob(20))
 			src << "<span class='warning'>You feel your headset vibrate but can hear nothing from it!</span>"
 	else
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 971e8c4a6f..085e070f0a 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -45,7 +45,7 @@
 	//blinded get reset each cycle and then get activated later in the
 	//code. Very ugly. I dont care. Moving this stuff here so its easy
 	//to find it.
-	blinded = null
+	blinded = 0
 	fire_alert = 0 //Reset this here, because both breathe() and handle_environment() have a chance to set it.
 
 	//TODO: seperate this out
diff --git a/code/modules/mob/living/silicon/robot/life.dm b/code/modules/mob/living/silicon/robot/life.dm
index 2008edec86..f28c464cea 100644
--- a/code/modules/mob/living/silicon/robot/life.dm
+++ b/code/modules/mob/living/silicon/robot/life.dm
@@ -114,9 +114,9 @@
 
 	src.density = !( src.lying )
 
-	if ((src.sdisabilities & BLIND))
+	if (src.sdisabilities & BLIND)
 		src.blinded = 1
-	if ((src.sdisabilities & DEAF))
+	if (src.sdisabilities & DEAF)
 		src.ear_deaf = 1
 
 	if (src.eye_blurry > 0)
diff --git a/code/modules/mob/mob.dm b/code/modules/mob/mob.dm
index 22f481e9f1..7a66deb3c4 100644
--- a/code/modules/mob/mob.dm
+++ b/code/modules/mob/mob.dm
@@ -56,19 +56,19 @@
 	if(!client)	return
 
 	if (type)
-		if(type & 1 && (sdisabilities & BLIND || blinded || paralysis) )//Vision related
+		if((type & 1) && ((sdisabilities & BLIND) || blinded || paralysis) )//Vision related
 			if (!( alt ))
 				return
 			else
 				msg = alt
 				type = alt_type
-		if (type & 2 && (sdisabilities & DEAF || ear_deaf))//Hearing related
+		if ((type & 2) && ((sdisabilities & DEAF) || ear_deaf))//Hearing related
 			if (!( alt ))
 				return
 			else
 				msg = alt
 				type = alt_type
-				if ((type & 1 && sdisabilities & BLIND))
+				if ((type & 1) && (sdisabilities & BLIND))
 					return
 	// Added voice muffling for Issue 41.
 	if(stat == UNCONSCIOUS || sleeping > 0)
@@ -1012,13 +1012,13 @@ mob/proc/yank_out_object()
 		if (ishuman(U))
 			var/mob/living/carbon/human/human_user = U
 			human_user.bloody_hands(H)
-			
+
 	else if(issilicon(src))
 		var/mob/living/silicon/robot/R = src
 		R.embedded -= selection
 		R.adjustBruteLoss(5)
 		R.adjustFireLoss(10)
-	
+
 	selection.forceMove(get_turf(src))
 	if(!(U.l_hand && U.r_hand))
 		U.put_in_hands(selection)
diff --git a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm
index e947e9ea15..08ec5df6c5 100644
--- a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm
+++ b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm
@@ -256,9 +256,13 @@
 	if(ishuman(M))
 		var/mob/living/carbon/human/H = M
 		var/obj/item/organ/internal/eyes/E = H.internal_organs_by_name[O_EYES]
-		if(E && istype(E))
+		if(istype(E))
+			if(E.status & ORGAN_ROBOT)
+				return
 			if(E.damage > 0)
 				E.damage = max(E.damage - 5 * removed, 0)
+			if(E.damage <= 5 && E.organ_tag == O_EYES)
+				H.sdisabilities &= ~BLIND
 
 /datum/reagent/peridaxon
 	name = "Peridaxon"
@@ -272,10 +276,13 @@
 /datum/reagent/peridaxon/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(ishuman(M))
 		var/mob/living/carbon/human/H = M
-
 		for(var/obj/item/organ/I in H.internal_organs)
-			if((I.damage > 0) && !(I.status & ORGAN_ROBOT)) //Peridaxon heals only non-robotic organs
+			if(I.status & ORGAN_ROBOT)
+				continue
+			if(I.damage > 0) //Peridaxon heals only non-robotic organs
 				I.damage = max(I.damage - removed, 0)
+			if(I.damage <= 5 && I.organ_tag == O_EYES)
+				H.sdisabilities &= ~BLIND
 
 /datum/reagent/ryetalyn
 	name = "Ryetalyn"
diff --git a/code/modules/surgery/organs_internal.dm b/code/modules/surgery/organs_internal.dm
index 41b6ad8cd4..48bb874290 100644
--- a/code/modules/surgery/organs_internal.dm
+++ b/code/modules/surgery/organs_internal.dm
@@ -87,6 +87,7 @@
 
 		if (!hasorgans(target))
 			return
+
 		var/obj/item/organ/external/affected = target.get_organ(target_zone)
 
 		for(var/obj/item/organ/I in affected.internal_organs)
@@ -109,12 +110,14 @@
 			return
 		var/obj/item/organ/external/affected = target.get_organ(target_zone)
 
-		for(var/obj/item/organ/I in affected.internal_organs)
+		for(var/obj/item/organ/internal/I in affected.internal_organs)
 			if(I && I.damage > 0)
 				if(!(I.status & ORGAN_ROBOT))
 					user.visible_message("<span class='notice'>[user] treats damage to [target]'s [I.name] with [tool_name].</span>", \
 					"<span class='notice'>You treat damage to [target]'s [I.name] with [tool_name].</span>" )
 					I.damage = 0
+					if(I.organ_tag == O_EYES)
+						target.sdisabilities &= ~BLIND
 
 	fail_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
 
diff --git a/code/modules/surgery/robotics.dm b/code/modules/surgery/robotics.dm
index 7ef998f3f3..107f3a2977 100644
--- a/code/modules/surgery/robotics.dm
+++ b/code/modules/surgery/robotics.dm
@@ -246,6 +246,8 @@
 					user.visible_message("<span class='notice'>[user] repairs [target]'s [I.name] with [tool].</span>", \
 					"<span class='notice'>You repair [target]'s [I.name] with [tool].</span>" )
 					I.damage = 0
+					if(I.organ_tag == O_EYES)
+						target.sdisabilities &= ~BLIND
 
 	fail_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)