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Ophthalmic Technician

Category - Microbiology and Pharmacology

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Which of the following methods of staining is NOT used on corneal scraping for diagnosis of fungal corneal ulcer?

10% KOH
Methylene blue
Calcofluor white
Trypan blue

Explanation

Answer: D - Trypan blue is used to stain the anterior capsule during cataract surgery.

All of the above except trypan blue, are methods of staining of corneal scraping, which is useful in the diagnosis of fungal corneal ulcer.

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