**Question:** All of the following are founding members of vision 2020 except -

A. International Agency for the Prevention of Blindness (IAPB)
B. World Health Organization (WHO)
C. Low Vision Services
D. National Program for Prevention and Control of Blindness

**Core Concept:** Vision 2020 is a global initiative launched in 1999 by the World Health Organization (WHO) and the International Agency for the Prevention of Blindness (IAPB) to eliminate avoidable blindness by 2020. The initiative aimed to reduce the number of people with avoidable blindness by 20% by 2010 and 50% by 2020.

**Why the Correct Answer is Right:**

The correct answer, **Option C: Low Vision Services**, is not part of the founding members of Vision 2020 because low vision services focus on providing rehabilitation and assistive devices to individuals with visual impairments, rather than preventing blindness. Vision 2020's goal is to eliminate avoidable blindness, which means preventing blindness rather than treating or managing it after it has occurred.

**Why Each Wrong Option is Incorrect:**

**Option A: International Agency for the Prevention of Blindness (IAPB)** is a correct founding member of Vision 2020. IAPB is a global alliance of non-governmental organizations working to eliminate avoidable blindness and vision impairment.

**Option B: World Health Organization (WHO)** is another founding member of Vision 2020. WHO is responsible for developing strategies, guidelines, and programs to improve global health.

**Option D: National Program for Prevention and Control of Blindness (NPCB)** is a correct founding member of Vision 2020 in India. The NPCB is responsible for implementing national strategies to reduce blindness at the local level within India.

**Clinical Pearl:** Vision 2020 is a global initiative focusing on prevention of blindness, while low vision services aim to improve the quality of life for those who are already visually impaired. Understanding the distinction between Vision 2020 and low vision services helps in recognizing the appropriate interventions for preventing blindness and improving visual health worldwide.