CLEC4F and dry eye syndrome: Cluster 2, Cluster 4, and Cluster 7 were identified as KCs based on canonical population markers: Cd5l, Vsig4, Fcna, and Clec4f. Additionally, Cd163 and Mrc1 (CD206) were highly expressed in Cluster 2 and Cluster 4, while they exhibited low expression in Cluster 7.