**Core Concept**
The treatment of iridocyclitis involves reducing inflammation and preventing complications. **Corticosteroids** are a cornerstone in the management of anterior uveitis, including iridocyclitis, due to their potent anti-inflammatory effects.

**Why the Correct Answer is Right**
The correct answer is a corticosteroid, specifically **Prednisolone**. Corticosteroids work by inhibiting the synthesis of pro-inflammatory cytokines and mediators, such as prostaglandins and leukotrienes, which contribute to the inflammatory response in iridocyclitis. **Prednisolone** is a commonly used corticosteroid in the treatment of uveitis due to its ability to penetrate the eye and reduce inflammation effectively.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify a corticosteroid, which is the primary treatment for iridocyclitis. **Option B:** This option is incorrect as it is a non-steroidal anti-inflammatory drug (NSAID), which may exacerbate uveitis in some cases. **Option D:** This option is incorrect as it is an antibiotic, which is not indicated in the treatment of iridocyclitis.

**Clinical Pearl / High-Yield Fact**
It's essential to note that corticosteroids should be used judiciously in the treatment of uveitis, as they can increase the risk of complications such as cataract formation and glaucoma. Regular eye exams and monitoring are crucial when using corticosteroids in the treatment of iridocyclitis.

**Correct Answer:** C. Prednisolone