Unityで微細眼球運動っぽい何か

EyeJitter.cs

using UnityEngine;
using System.Collections;

public class EyeJitter : MonoBehaviour {

    float      timer           = 0.0f;
    Quaternion rot;


    public float   changeTime      = 0.4f; // 変更する時間最小値
    public float   changeTimeRange = 2.0f; // 変更する時間幅（乱数）
    public Vector2 range           = new Vector2(0.001f, 0.03f); // 可動範囲

    public Transform rightEye;   // ex.) 93.!joint_RightEye
    public Transform leftEye;    // ex.) 95.!joint_LeftEye


    void Start () {
    }
 	
	void LateUpdate () {
        timer -= Time.deltaTime;

        if ( timer <= 0.0f ) {
            timer += Random.Range(changeTime, changeTimeRange);

            Vector3 v = Vector3.zero;
            v.x = Random.Range(-range.x, +range.x);
            v.y = Random.Range(-range.y, +range.y);

            rot = Quaternion.EulerRotation(v);
        }

        leftEye.localRotation  *= rot;
        rightEye.localRotation *= rot;
    }
}