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diff --git a/Assets/Samples/XR Interaction Toolkit/3.1.2/Starter Assets/Scripts/GazeInputManager.cs b/Assets/Samples/XR Interaction Toolkit/3.1.2/Starter Assets/Scripts/GazeInputManager.cs
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+++ b/Assets/Samples/XR Interaction Toolkit/3.1.2/Starter Assets/Scripts/GazeInputManager.cs
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+using System.Collections.Generic;
+using UnityEngine.InputSystem;
+
+namespace UnityEngine.XR.Interaction.Toolkit.Samples.StarterAssets
+{
+    /// <summary>
+    /// Manages input fallback for <see cref="XRGazeInteractor"/> when eye tracking is not available.
+    /// </summary>
+    public class GazeInputManager : MonoBehaviour
+    {
+        // This is the name of the layout that is registered by EyeGazeInteraction in the OpenXR Plugin package
+        const string k_EyeGazeLayoutName = "EyeGaze";
+
+        [SerializeField]
+        [Tooltip("Enable fallback to head tracking if eye tracking is unavailable.")]
+        bool m_FallbackIfEyeTrackingUnavailable = true;
+
+        /// <summary>
+        /// Enable fallback to head tracking if eye tracking is unavailable.
+        /// </summary>
+        public bool fallbackIfEyeTrackingUnavailable
+        {
+            get => m_FallbackIfEyeTrackingUnavailable;
+            set => m_FallbackIfEyeTrackingUnavailable = value;
+        }
+
+
+        bool m_EyeTrackingDeviceFound;
+
+        /// <summary>
+        /// See <see cref="MonoBehaviour"/>.
+        /// </summary>
+        protected void Awake()
+        {
+            // Check if we have eye tracking support
+            var inputDeviceList = new List<InputDevice>();
+            InputDevices.GetDevicesWithCharacteristics(InputDeviceCharacteristics.EyeTracking, inputDeviceList);
+            if (inputDeviceList.Count > 0)
+            {
+                Debug.Log("Eye tracking device found!", this);
+                m_EyeTrackingDeviceFound = true;
+                return;
+            }
+
+            foreach (var device in InputSystem.InputSystem.devices)
+            {
+                if (device.layout == k_EyeGazeLayoutName)
+                {
+                    Debug.Log("Eye gaze device found!", this);
+                    m_EyeTrackingDeviceFound = true;
+                    return;
+                }
+            }
+
+            Debug.LogWarning($"Could not find a device that supports eye tracking on Awake. {this} has subscribed to device connected events and will activate the GameObject when an eye tracking device is connected.", this);
+
+            InputDevices.deviceConnected += OnDeviceConnected;
+            InputSystem.InputSystem.onDeviceChange += OnDeviceChange;
+
+            gameObject.SetActive(m_FallbackIfEyeTrackingUnavailable);
+        }
+
+        /// <summary>
+        /// See <see cref="MonoBehaviour"/>.
+        /// </summary>
+        protected void OnDestroy()
+        {
+            InputDevices.deviceConnected -= OnDeviceConnected;
+            InputSystem.InputSystem.onDeviceChange -= OnDeviceChange;
+        }
+
+        void OnDeviceConnected(InputDevice inputDevice)
+        {
+            if (m_EyeTrackingDeviceFound || !inputDevice.characteristics.HasFlag(InputDeviceCharacteristics.EyeTracking))
+                return;
+
+            Debug.Log("Eye tracking device found!", this);
+            m_EyeTrackingDeviceFound = true;
+            gameObject.SetActive(true);
+        }
+
+        void OnDeviceChange(InputSystem.InputDevice device, InputDeviceChange change)
+        {
+            if (m_EyeTrackingDeviceFound || change != InputDeviceChange.Added)
+                return;
+
+            if (device.layout == k_EyeGazeLayoutName)
+            {
+                Debug.Log("Eye gaze device found!", this);
+                m_EyeTrackingDeviceFound = true;
+                gameObject.SetActive(true);
+            }
+        }
+    }
+}