Which diagnostic test is recommended for suspected fungal keratitis?

Which diagnostic test is recommended for suspected fungal keratitis?

• A. Slit-lamp exam only
• B. Visual acuity test
• C. Fundus photography
• D. Confocal imaging

Answer: (D)

Fungal keratitis is best diagnosed by directly visualizing fungal elements in the cornea. While the slit-lamp exam is essential for assessing the appearance and extent of the corneal infection, it cannot confirm the presence of fungal organisms on its own. Visual acuity and fundus photography don’t specifically assess the anterior cornea or reveal fungal filaments. In vivo confocal imaging provides real-time, high-resolution visualization of fungal hyphae within the corneal stroma, offering rapid, noninvasive confirmation that helps distinguish fungal infection and guides timely antifungal treatment while awaiting culture results.

Fungal keratitis is best diagnosed by directly visualizing fungal elements in the cornea. While the slit-lamp exam is essential for assessing the appearance and extent of the corneal infection, it cannot confirm the presence of fungal organisms on its own. Visual acuity and fundus photography don’t specifically assess the anterior cornea or reveal fungal filaments. In vivo confocal imaging provides real-time, high-resolution visualization of fungal hyphae within the corneal stroma, offering rapid, noninvasive confirmation that helps distinguish fungal infection and guides timely antifungal treatment while awaiting culture results.