Figure 6From: Collection of corneal impression cytology directly on a sterile glass slide for the detection of viral antigen: An inexpensive and simple technique for the diagnosis of HSV epithelial keratitis – A pilot study Impression cytology smear stained by Papanicolaou stain. Note the presence of koilocytic changes in the epithelial cells. Koilocytic changes like condensed chromatin (arrow) and a perinuclear halo (arrow head) are seen, × 500.Back to article page