干眼的诊断治疗新进展,2,干眼的定义,称谓干眼、干眼症、干眼病、干燥性角膜结膜炎和“泪液功能障碍综合征”（dysfunctional tear syndrome）等 NEI (1995) 由于泪液缺乏或蒸发过强导致泪膜不稳定和睑裂部眼表损害，伴随眼部各种不适症状 International Dry Eye WorkShop (2007) 多种因素所致的一种泪液和眼表疾病，包括眼表不适症状、视力变化和泪膜不稳定并具有潜在眼表损害，伴随泪液渗透压升高和眼表炎症,Behrens A, et al. Dysfunctional tear syndrome: a Delphi approach to treatment recommendations. Cornea. 2006; 25: 900907. Dogru M, et al. Changing Trends in the Definition and Diagnosis of Dry Eyes. Am J Ophthalmol, 2005, 104: e1-e4.,3,泪液功能单位（Lacrimal Functional Unit, L
