Purpose: To evaluate the clinical value of fixed visual field examination on thyroid-associated ophthalmopathy patient., Methods: The fixed visual field examination was conducted on 27 thyroid-associated ophthalmopathy patients., Results: When the ocular-motor deficit ratio is less than value -4, the patient's fixed visual field is between 0-15 degree; when the ocular-motor deficit ratio is less than value -3, the patient's fixed visual field is between 18-28 degree; when the ocular-motor deficit ratio is less than value -2, the patient's fixed visual field is between 28-38 degree; when the ocular-motor deficit ratio is less than value -1, the patient's fixed visual field is between 40-43 degree; when the ocular-motor system is normal, the patient's fixed visual is between 45-50 degree., Conclusion: The results from the fixed visual field examination can give direct and accurate evaluation on how and where the ocular muscle has been affected by the thyroid-associated ophthalmopathy.