final stuff, i think?

code/modules/surgery/organs/eyes.dm

@@ -87,28 +87,35 @@
 
 /obj/item/organ/eyes/applyOrganDamage(d, maximum = maxHealth)
 	. = ..()
-	if(!.)
-		return
-	var/old_damaged = eye_damaged
-	switch(damage)
-		if(INFINITY to maxHealth)
-			eye_damaged = BLIND_VISION_THREE
-		if(maxHealth to high_threshold)
-			eye_damaged = BLURRY_VISION_TWO
-		if(high_threshold to low_threshold)
-			eye_damaged = BLURRY_VISION_ONE
-		else
+	if(!owner)
+		return FALSE
+	apply_damaged_eye_effects()
+
+/// Applies effects to our owner based on how damaged our eyes are
+/obj/item/organ/eyes/proc/apply_damaged_eye_effects()
+	// we're in healthy threshold, either try to heal (if damaged) or do nothing
+	if(damage <= low_threshold)
+		if(eye_damaged)
 			eye_damaged = FALSE
-	if(eye_damaged == old_damaged || !owner)
+			// clear nearsightedness from damage
+			owner.clear_fullscreen(EYE_DAMAGE)
+			// and cure blindness from damage
+			owner.cure_blind(EYE_DAMAGE)
 		return
-	if(old_damaged == BLIND_VISION_THREE)
-		owner.cure_blind(EYE_DAMAGE)
-	else if(eye_damaged == BLIND_VISION_THREE)
+
+	//various degrees of "oh fuck my eyes", from "point a laser at your eye" to "staring at the Sun" intensities
+	// 50 - blind
+	// 49-31 - nearsighted (2 severity)
+	// 30-20 - nearsighted (1 severity)
+	if(organ_flags & ORGAN_FAILING)
+		// become blind from damage
 		owner.become_blind(EYE_DAMAGE)
-	if(eye_damaged && eye_damaged != BLIND_VISION_THREE)
-		owner.overlay_fullscreen("eye_damage", /atom/movable/screen/fullscreen/scaled/impaired, eye_damaged)
+
 	else
-		owner.clear_fullscreen("eye_damage")
+		// become nearsighted from damage
+		owner.overlay_fullscreen(EYE_DAMAGE, /atom/movable/screen/fullscreen/scaled/impaired, damage > high_threshold ? 2 : 1)
+
+	eye_damaged = TRUE
 
 /obj/item/organ/eyes/night_vision
 	name = "shadow eyes"