Which technique can be used as an advanced diagnostic tool for fungal corneal infections?

• A. Confocal microscopy
• B. Slit-lamp biomicroscopy
• C. Tonometry
• D. Ultrasonography

Answer: (A)

Detecting fungal invasion in the cornea at the microstructural level is critical for prompt, targeted treatment. Confocal microscopy provides real-time, high-resolution, in vivo imaging of the cornea, allowing direct visualization of fungal filaments and spores within the corneal stroma. This enables rapid confirmation of fungal keratitis and helps guide antifungal therapy, as well as monitor how the infection responds to treatment, all without needing to remove tissue. Slit-lamp biomicroscopy, while essential for overall assessment of the ulcer and corneal changes, cannot reliably reveal fungal elements at the microscopic level. Tonometry and ultrasonography offer functional or structural information about the eye but do not provide specific visualization of fungal organisms in the cornea.