研究目的:
                        
                            Objective: To evaluate the effect of transcutaneous auricular vagus nerve stimulation  (taVNS) for the patients with dry eye disease.    Methods: The investigators enrolled 256 patients at Beijing Tongren Hospital. Patients  completed questionnaires at baseline, 1 month, 3 months, and 6 months. OSDI score, TBUT,  Schirmer I, CFS, SF36, DEQ5, and psychological status to evaluate the therapeutic  effects. A difference of P < 0.05 was considered statistically significant.