In what cases are ocular cytology indicated?

• A. Only corneal ulcers
• B. Only lids/conjunctiva
• C. Any corneal ulcer, abrasion, opacity, or mass (can also be on lids/conjunctiva PRN)
• D. Only conjunctival masses

Answer: (C)

Ocular cytology is a versatile, minimally invasive tool used to characterize surface eye lesions by examining the cells present. It helps distinguish bacterial or fungal infections, inflammatory versus neoplastic processes, and other cellular changes, guiding treatment decisions.

That broad applicability makes it appropriate for any corneal surface lesion—ulcers, abrasions, opacities, or masses—and it can also be used on the lids or conjunctiva when indicated. In corneal ulcers, cytology can reveal infectious organisms or the nature of the inflammatory infiltrate, helping choose targeted therapy. For corneal opacities or masses, it can help differentiate inflammation from neoplasia or granulomatous disease. On the lids or conjunctiva, impression cytology can aid in chronic conjunctival disease or eyelid lesions.

Impression cytology and corneal scrapings provide rapid cellular information and can be performed alongside cultures or histopathology as needed. Keep in mind that cytology is one piece of the diagnostic puzzle and sample quality matters, but its breadth of indicated scenarios is what makes it the best choice in this context.