Introduction: The diagnosis of Primary Sjögren's Syndrome (pSS) is sometimes challenging, taking into account the clinical heterogeneity and the variability of diagnostic criteria fulfillment. This study aims to evaluate the tear meniscus (TM) and corneal sub-basal nerve plexus (SBNP) in a population with pSS. Material and Methods: Cross-sectional study of 50 patients with pSS and 20 healthy controls. Conventio...