HSV Epithelial Keratitis and Dry Eye (Case 4, cont.)

a

Fig. 3.24  A part of a large HSV epithelial lesion. Close view of the area indicated by arrow is shown in Fig. 3.25

area of observation

b

Fig. 3.25  a–b (a) The lesion shows many “bright” (white arrowhead) and “dull” (black arrowhead) swollen/ rounded cells.Visible in the surroundings is fine (basal) epithelial edema (arrow). (b) Diseased surface cells/cell debris within the same part of the lesion stain heavily with rose bengal. The surrounding bright halo (arrow) is caused by fluorescein diffusion (cf. Fig. 3.24). The tear fluid is concurrently stained red with rose bengal dye