脂质运载蛋白2（LCN2/NGAL）是一种多效性分泌糖蛋白，通过调控铁代谢、炎症反应及细胞死亡（铁死亡、凋亡）等机制，广泛参与眼科疾病的病理进程。生理状态下，LCN2在角膜上皮、视网膜神经节细胞层等部位低表达；病理条件下，其表达显著上调且功能呈现高度背景依赖性。在各类眼科疾病（如干眼症、角膜疾病、葡萄膜炎、青光眼、视网膜疾病等）中，既可表现为促炎促凋亡的致病因子，亦能发挥抗炎保护作用。靶向调控LCN2表达或其下游通路可能为眼科疾病治疗提供新策略。

Lipocalin-2 (LCN2/NGAL) is a multifunctional secretory glycoprotein that plays a critical role in the pathogenesis of ophthalmic diseases by regulating iron metabolism, inflammatory responses, and cell death pathways (ferroptosis, apoptosis). Under physiological conditions, LCN2 is expressed at low levels in tissues such as the corneal epithelium and retinal ganglion cell layer. However, its expression is significantly upregulated under pathological conditions, exhibiting highly context-dependent functionality. In major ophthalmic diseases—including dry eye disease, corneal disorders, uveitis, glaucoma, and retinal diseases—LCN2 can act either as a pro-inflammatory and pro-apoptotic pathogenic factor or as an anti-inflammatory protective agent. Targeted modulation of LCN2 expression or its downstream pathways may offer novel therapeutic strategies for ocular diseases.