①65 years of age or older; ②Comorbid systemic diseases such as diabetes mellitus and heart disease; ③Patients at risk for surgery Poor facial sensation during RFE keratitis Trigeminal nerve motor branch disorders ④Patients who are inoperable Contralateral hearing impairment, no trigeminal nerve vascular contact or compression on MRI, trigeminal nerve demyelination, prior surgical treatment Combined MS, etc.