diff --git a/src/js/surgery.js b/src/js/surgery.js
index 27a6159e36926dbd70f283e03e343bf9c58e30d9..f78ec553f5087b9f230904ee847afefde7bb16e2 100644
--- a/src/js/surgery.js
+++ b/src/js/surgery.js
@@ -553,7 +553,7 @@ window.eyeSurgery = function(slave, side, action) {
 	}
 
 	function addEye(slave) {
-		slave.eye[side] = new App.Entity.EyeState();
+		slave.eye[side] = new App.Entity.SingleEyeState();
 		resetEyeColor(slave, side);
 	}