In which condition is Rose Bengal primarily used?

Rose Bengal is primarily used in the context of herpes simplex keratitis due to its ability to stain damaged cells on the corneal surface, which can assist in both diagnosis and assessment of the extent of corneal epithelial damage caused by the viral infection. In cases of herpes simplex keratitis, the presence of corneal ulcers or dendritic lesions can be visualized using the dye, highlighting areas where the epithelial barrier has been compromised. This aids in the identification and management of the condition, allowing practitioners to monitor healing or progression of the disease.

While Rose Bengal has applications in other ocular conditions, such as assessing corneal dryness where it can reveal the integrity of the corneal epithelium, its primary and most notable use is associated with herpes simplex keratitis. It is less relevant for conditions like conjunctivitis or retinal detachment, where other diagnostic tools and treatments are typically employed instead. Therefore, its specific utility in herpes simplex keratitis distinguishes it as the primary condition in which Rose Bengal is utilized.