## **Core Concept**
Fungal keratomycosis, also known as fungal keratitis, is a serious infection of the cornea caused by fungi. Treatment typically involves antifungal medications. Understanding the spectrum of activity of various antibiotics and antifungals is crucial for managing such infections.

## **Why the Correct Answer is Right**
Natamycin is a polyene antifungal drug that is specifically used for the treatment of fungal infections of the eye, including keratomycosis. It works by disrupting the fungal cell membrane, leading to cell death. Natamycin is effective against a wide range of fungi, including yeasts and molds, making it a first-line treatment for fungal keratitis.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and cannot be evaluated.
- **Option B:** This option is blank and cannot be evaluated.
- **Option C:** This option is blank and cannot be evaluated.
- **Option D:** This option is blank and cannot be evaluated.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that natamycin is the only antifungal drug approved by the FDA for topical treatment of fungal keratitis. It is essential to distinguish between antibacterial and antifungal agents, as their spectra of activity and uses are quite different.

## **Correct Answer:** . Natamycin