**Core Concept**
The National Programme for Control of Blindness (NPCB) aimed to reduce the prevalence of avoidable blindness in India through a comprehensive approach. The program focused on addressing various eye conditions, but one specific condition received World Bank assistance.

**Why the Correct Answer is Right**
The National Programme for Control of Blindness received World Bank assistance for the treatment of **Trachoma**, a bacterial infection caused by Chlamydia trachomatis. Trachoma is a leading cause of preventable blindness worldwide, particularly in areas with poor hygiene and sanitation. The World Bank assistance was crucial in implementing control measures, including surgery, antibiotics, and hygiene promotion, to combat this condition.

**Why Each Wrong Option is Incorrect**
* **Option A:** Cataract surgery was also a component of the NPCB, but it did not receive World Bank assistance specifically for this condition.
* **Option B:** Glaucoma is another major cause of blindness, but it was not the primary focus of the World Bank's assistance to the NPCB.
* **Option C:** Corneal blindness can result from various causes, including infections and trauma, but it was not the condition for which the World Bank provided assistance to the NPCB.

**Clinical Pearl / High-Yield Fact**
The World Health Organization (WHO) has launched the Global Trachoma Mapping Project to estimate the prevalence of trachoma in endemic countries and to guide targeted interventions.

**Correct Answer:** C.