LTF and dry eye syndrome: This is a comprehensive study of lipocalin, lactoferrin and lysozyme in dry-eyed PM women and our results suggested that lactoferrin could be used as a biomarker of DE in postmenopausal women.<h4>Abbreviations</h4>PM = postmenopausal; DE = dry eye disease; NDE = non-dry eye; ELISA = Enzyme-linked immunosorbent assay.