A single visit cross-sectional study was performed. Approximately 40 chronic dry eye participants who had FS-LASIK more than 12month prior were recruited. Approximately 40 dry eye participants without refractive surgery history and 40 healthy participants without dry eye were also recruited as control groups.
In recent years, many scholars have studied the ocular surface damage of patients with dry eye disease（DED）after FS-LASIK, but there has been a lack of comprehensive observation and research on the relationship and difference between dry eye （DE）patients with and without LASIK. Therefore, the purpose of this study was to investigate the characteristics of ocular surface and cytokines after FS-LASIK, and further explain the pathogenesis of chronic dry eyes after FS-LASIK.