## Core Concept
The National Programme for Control of Blindness (NPCB) is a government initiative aimed at reducing blindness and improving eye care services in India. The program focuses on cataract surgery, prevention of refractive errors, and promotion of eye health.

## Why the Correct Answer is Right
The correct answer, , is a feature of NPCB as it focuses on providing free cataract surgery services to patients, especially in rural and underserved areas. This is a key component of the program to reduce cataract-related blindness.

## Why Each Wrong Option is Incorrect
* **Option A:** - This option is incorrect because while training of ophthalmologists might be tangentially related, NPCB specifically emphasizes service delivery and infrastructure.
* **Option B:** - This option is incorrect as the distribution of spectacles for refractive errors is indeed a part of the program to correct vision problems.
* **Option D:** - This option is incorrect because creating awareness about eye health and diseases is also a goal of NPCB.

## Clinical Pearl / High-Yield Fact
A key aspect of NPCB is its focus on making eye care services accessible and affordable. A memorable point is that NPCB has significantly contributed to increasing cataract surgery rates and reducing blindness in India.

## Correct Answer: D.