**Question:** Which of the following is used as an adjuvant therapy for fungal corneal ulcer?

A. Amphotericin B
B. Corticosteroids
C. Fluorouracil
D. Mitomycin C

**Core Concept:**
The question is asking about an appropriate medication to be used in conjunction with the primary treatment for fungal corneal ulcers. Adjuvant therapy refers to the use of additional treatments to enhance the effectiveness of primary treatments and reduce complications. In the context of fungal corneal ulcers, adjuvant therapy is crucial for improving the outcome and preventing the progression of the infection.

**Why the Correct Answer is Right:**
Amphotericin B (A) is a widely used antifungal agent for the treatment of fungal infections, including those affecting the cornea. It acts by inhibiting ergosterol synthesis in fungal cells, leading to membrane disruption and death. The use of Amphotericin B as an adjuvant therapy in fungal corneal ulcers strengthens the primary treatment and helps in reducing the severity and progression of the infection.

**Why Each Wrong Option is Incorrect:**
B. Corticosteroids (Option B) are immunosuppressive agents typically used to reduce inflammation and edema. In the context of fungal corneal ulcers, corticosteroids may hinder the patient's immune response against the fungal infection, leading to a poorer prognosis.

C. Fluorouracil (Option C) is an antineoplastic agent primarily used for cancer treatment. Its use in fungal corneal ulcers would be inappropriate due to its cytotoxic nature and potential to exacerbate the infection rather than improve the treatment outcome.

D. Mitomycin C (Option D) is an antineoplastic agent, similar to fluorouracil, and is not indicated for fungal corneal ulcers. Its use may worsen the patient's condition by suppressing the immune response and enhancing the infection progression.

**Clinical Pearl:**
In the management of fungal corneal ulcers, using adjuvant therapy with Amphotericin B is essential to improve treatment outcomes and reduce complications. However, it is crucial to avoid using corticosteroids, antineoplastic agents like fluorouracil and mitomycin C, as they may hinder the immune response and worsen the infection.