OnMouseDown() ios subsitute not function correctly

For some reason, the Y origin of the ray is about 10 units higher than it should be when I tap the screen.

The screen size matches the device I'm testing with and also the cameras Y position is 0.

 #if UNITY_IOS || UNITY_ANDROID || UNITY_WP8 || UNITY_IPHONE
 
 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class ConvertToTouch : MonoBehaviour
 {
     void Update ()
     {
         // Code for OnMouseDown in the iPhone
         RaycastHit hit = new RaycastHit();
         for (int i = 0; i < Input.touchCount; ++i)
         {
             if (Input.GetTouch(i).phase.Equals(TouchPhase.Began))
             {
                 // Construct a ray from the current touch coordinates
                 Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(i).position);
                 Debug.Log (ray);
                 if (Physics.Raycast(ray, out hit))
                 {
                     hit.transform.gameObject.SendMessage("OnMouseDown");
                 }
             }
         }
     }
 }
 #endif