Certified Ophthalmic Assistant Practice Exam

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Rose Bengal stain is helpful in identifying which condition?

Keratoconjunctivitis
Blepharitis
Cataracts
Glaucoma

The correct answer is: Keratoconjunctivitis

Rose Bengal stain is particularly useful in identifying keratoconjunctivitis because it specifically highlights areas of damage or dryness on the conjunctiva and cornea. When applied, the dye stains devitalized or damaged epithelial cells, allowing practitioners to visualize defects in the ocular surface. In cases of keratoconjunctivitis, there is often inflammation and changes to the epithelial layer, making this staining method valuable for diagnosis. In contrast, while conditions like blepharitis may involve the eyelids, they do not directly affect the cornea or conjunctiva in a way that would be highlighted by this stain. Cataracts and glaucoma are primarily related to internal changes in the eye and do not involve surface damage that would be seen with Rose Bengal staining. Therefore, the staining is most relevant for detecting epithelial damage characteristic of keratoconjunctivitis.