Strikingly, the markers of CD8+ T cells, blood vessels, erythrocytes, corneal endothelial cells, limbal fibroblasts, and limbal keratocytes were most affected in viral keratitis, whereas in bacterial/fungal keratitis, the strongest alterations were seen in monocyte-derived macrophages/dendritic cells, macrophages, conjunctival epithelium, corneal endothelium, limbal progenitor cells, and limbal keratocytes (Figures 4A, C). Here, CD8A is linked to fungal keratitis.