works on my machine

code/modules/clothing/glasses/prescription_kit.dm

@@ -10,13 +10,23 @@
 /obj/item/prescription_kit/attackby(obj/item/I, mob/living/user, params)
 	if(istype(I, /obj/item/clothing/glasses) && I.Adjacent(user))
 		var/obj/item/clothing/glasses/target_glasses = I
-		if(target_glasses.vision_correction)
+		prescribe(target_glasses, user)
-			to_chat(user, span_notice("These are already fitted with prescription lenses or otherwise already correct vision!"))
-			return
-		playsound(src, 'sound/items/screwdriver.ogg', 50, 1)
-		user.visible_message(span_notice("[user] fits \the [target_glasses] with a prescription overlay device."), span_notice("You fit \the [target_glasses] with a prescription overlay device."))
-		target_glasses.prescribe()
-		target_glasses.balloon_alert(user, "prescription fitted!")
-		qdel(src)
 	else
 		return ..()
+
+/obj/item/prescription_kit/afterattack(atom/target, mob/user, proximity_flag, click_parameters)
+	if(istype(target, /obj/item/clothing/glasses) && target.Adjacent(user))
+		var/obj/item/clothing/glasses/target_glasses = target
+		prescribe(target_glasses, user)
+	else
+		. = ..()
+
+/obj/item/prescription_kit/proc/prescribe(obj/item/clothing/glasses/target_glasses, mob/user)
+	if(target_glasses.vision_correction)
+		to_chat(user, span_notice("These are already fitted with prescription lenses or otherwise already correct vision!"))
+		return
+	playsound(src, 'sound/items/screwdriver.ogg', 50, 1)
+	user.visible_message(span_notice("[user] fits \the [target_glasses] with a prescription overlay device."), span_notice("You fit \the [target_glasses] with a prescription overlay device."))
+	target_glasses.prescribe()
+	target_glasses.balloon_alert(user, "prescription fitted!")
+	qdel(src)