## **Core Concept**
Chronic acquired dacryocystitis refers to a chronic inflammation of the lacrimal sac, often resulting from nasolacrimal duct obstruction. The primary goal of treatment is to relieve the obstruction and restore tear drainage.

## **Why the Correct Answer is Right**
The surgery of choice for chronic acquired dacryocystitis is **Dacryocystorhinostomy (DCR)**, which involves creating a new passage between the lacrimal sac and the nasal cavity to bypass the obstructed nasolacrimal duct. This procedure helps to restore normal tear drainage and alleviate symptoms. DCR is effective in treating chronic dacryocystitis by directly addressing the site of obstruction.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Endoscopic approach might be used in some cases but is not the primary surgery of choice for chronic acquired dacryocystitis.
- **Option B:** Conjunctivorhinostomy is a procedure that creates a direct communication between the conjunctiva and the nasal cavity, which is not the standard treatment for chronic dacryocystitis.
- **Option C:** Canaliculorhinostomy involves creating a new passage from the canaliculus to the nasal cavity and is not typically the first-line treatment for chronic acquired dacryocystitis.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **Dacryocystorhinostomy (DCR)** is often performed endoscopically nowadays, which is less invasive and has a high success rate. This procedure can significantly improve symptoms of chronic dacryocystitis, such as epiphora (excessive tearing) and recurrent infections.

## **Correct Answer:** D. Dacryocystorhinostomy.