**Core Concept:** Vitamin A is essential for maintaining ocular health and preventing blindness due to its role in maintaining corneal integrity, visual acuity, and night vision. The National Programme for Prevention of Nutritional Blindness is an initiative aimed at reducing the incidence of vitamin A deficiency-related blindness in India.

**Why the Correct Answer is Right:** The initiative mentioned in the question, the National Programme for Prevention of Nutritional Blindness, was launched in March 2005. By providing a single dose of vitamin A to children aged 6-11 months, the program aims to prevent blindness caused by vitamin A deficiency, which is common in this age group due to their increased nutritional requirements and lower dietary intake of vitamin A.

**Why Each Wrong Option is Incorrect:**

A. This option is incorrect because the National Programme for Prevention of Nutritional Blindness was launched in March 2005, not in March 2006.
B. This option is incorrect because the initiative was launched in March 2005, not in March 2007.
C. This option is incorrect because the National Programme for Prevention of Nutritional Blindness was launched in March 2005, not in March 2008.
D. This option is incorrect because the initiative was launched in March 2005, not in March 2009.

**Clinical Pearl:** The National Programme for Prevention of Nutritional Blindness is a vital initiative that has significantly contributed to reducing vitamin A deficiency-related blindness in India. By ensuring that children receive a single dose of vitamin A supplementation at the right time, medical professionals can protect the health of young children and reduce the burden of vitamin A deficiency-related blindness.