It should probably actually compile

code/modules/mob/living/simple_animal/hostile/statue.dm

@@ -213,7 +213,7 @@
 				name = "Toggle Nightvision \[ON]"
 			else
 				target.see_invisible = SEE_INVISIBLE_LIVING
-				name = "Toggle Nightvision \[OFF]"*/
+				name = "Toggle Nightvision \[OFF]"
 
 /mob/living/simple_animal/hostile/statue/sentience_act()
 	faction -= "neutral"

code/modules/surgery/eye_surgery.dm

@@ -15,7 +15,7 @@
 	var/obj/item/organ/eyes/E = target.getorganslot("eye_sight")
 	if(!E)
 		user << "It's hard to do surgery on someones eyes when they don't have any."
-		return 0
+		return FALSE
 
 /datum/surgery_step/fix_eyes/preop(mob/user, mob/living/carbon/target, target_zone, obj/item/tool, datum/surgery/surgery)
 	user.visible_message("[user] begins to fix [target]'s eyes.", "<span class='notice'>You begin to fix [target]'s eyes...</span>")
@@ -27,7 +27,7 @@
 	target.cure_nearsighted()
 	target.blur_eyes(35)	//this will fix itself slowly.
 	target.set_eye_damage(0)
-	return 1
+	return TRUE
 
 /datum/surgery_step/fix_eyes/failure(mob/user, mob/living/carbon/target, target_zone, obj/item/tool, datum/surgery/surgery)
 	if(target.getorgan(/obj/item/organ/brain))
@@ -35,4 +35,4 @@
 		target.adjustBrainLoss(100)
 	else
 		user.visible_message("<span class='warning'>[user] accidentally stabs [target] right in the brain! Or would have, if [target] had a brain.</span>", "<span class='warning'>You accidentally stab [target] right in the brain! Or would have, if [target] had a brain.</span>")
-	return 0
+	return FALSE