Tear lysozyme

Among various secretions of human body, the content of lysozyme in tear fluid is the highest, which is more than 1000 times of that in serum. It is mainly produced by lacrimal gland tissue and plays an important role in the local non-specific immunity of the body. Lysozyme is a trapping protein with a molecular weight of 14,700, which can catalyze the hydrolysis of bacterial cell walls. Therefore, it plays an important role in resisting bacterial infection, especially Gram-positive bacteria. Lysozyme has a very high concentration in tears, accounting for 20 to 04% of total tear protein, which is 1,000 times higher than serum concentration Is an important defensive substance on the surface of the eyeball. Currently used for examination of dry eye.