## **Core Concept**
Chronic dacrocystitis refers to a persistent inflammation of the lacrimal sac, often due to a blockage in the nasolacrimal duct. This condition can lead to recurrent infections and tearing. The treatment aims to relieve the obstruction and infection.

## **Why the Correct Answer is Right**
The correct answer, **Dacryocystorhinostomy (DCR)**, is a surgical procedure that creates a new passage for tears to drain from the lacrimal sac directly into the nasal cavity, bypassing any blockage in the nasolacrimal duct. This procedure is effective for treating chronic dacrocystitis by addressing the underlying cause of the obstruction and inflammation.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and does not provide a viable treatment alternative.
- **Option B:** This option is also blank and does not offer a recognized treatment for chronic dacrocystitis.
- **Option C:** Similarly, this option is blank and lacks a valid treatment choice.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **DCR** is often considered when conservative treatments (like antibiotics for acute infections) fail to manage chronic dacrocystitis. This procedure can significantly improve symptoms and prevent future infections.

## **Correct Answer:** D. Dacryocystorhinostomy (DCR).