Which tests use dyes to visualize damaged cells on the cornea?

The correct choice involves Rose Bengal and Green Lissamine dyes, both of which are used in clinical practice to assess the integrity of the corneal epithelium. These dyes are vital in identifying damaged or diseased epithelial cells in the cornea.

Rose Bengal stains devitalized or damaged cells, allowing for visualization of areas where the corneal surface has been compromised. It has an affinity for cells that have lost their protective barrier or have been subjected to a pathological process, thereby highlighting conditions like dry eye syndrome or herpes simplex keratitis.

Green Lissamine serves a similar purpose, providing a contrast against the healthy epithelium, thus aiding practitioners in pinpointing the location and extent of corneal damage. Both dyes are essential tools because they help in the diagnosis of ocular surface disorders and guide treatment decisions.

Other tests mentioned in the options do not utilize dyes specifically for visualizing damaged cells. The Break Up Time (BUT) measures the stability of the tear film, and Schirmer's Test evaluates tear production rather than directly visualizing cell damage. Consequently, the choice that includes Rose Bengal and Green Lissamine is indeed the one that accurately reflects the use of dyes for assessing corneal health.