DED evaluation
congestion
DRY EYE, CONGESTION
DED-1L Dry Eye Analyzer (Kanghuaruiming Science Technology, China) is a comprehensive dry eye diagnostic system that performs non-invasive tear film break-up time (NIBUT), tear meniscus height (TMH), lipid layer interferometry, and congestion assessment [The LipiView Ocular Surface Interferometer (TearScience, United States) measures the absolute thickness of the lipid layer using interferometric images of the tear film. During the examination, the participants were asked to maintain still and blink normally. The camera was adjusted to focus on the tear film plane and captured a 25-s video with a clear interferometric image of the tear film [To avoid introducing bias from diurnal variations, objective DED evalutions were performed in the mornings. The participants were asked to complete the OSDI questionnaire at preoperative examination and 1-month follow-up.