AIM:To analyze the causes of dry eye syndrome after LASIK.METHODS:During January 2008 to January 2011,122 patients (244 eyes) who were diagnosed dry eye syndrome in outpatient clinic were selected.Patients were performed the examination of visual acuity,Schirmer Ⅰ test (SⅠ t),dry eye questionnaire,and 15minutes later examining the anterior segment with slit lamp,the tear breakup time (BUT) and fluorescein (FL) staining.RESULTS:The most common symptoms of dry eye patients was visual fatigue,accounting for 88.5% of total number;dry eye in 75 patients,accounting for 61.5%;vision fluctuation in 93 patients,accounting for 76.2%;foreign body sensation in 84 patients,accounting for 68.9%;itching eyes in 83 patients,accounting for 68.0%.CONCLUSION:The causes of dry eye syndrome after LASIK are cornea integrity damage,nerve missing and failed follow-up after LASIK.