Number of centre of excellence in vision 2020 –

**Core Concept**
Vision 2020 is a global initiative to eliminate avoidable blindness by the year 2020. It was launched by the World Health Organization (WHO) and the International Agency for the Prevention of Blindness (IAPB). The initiative focuses on preventing and treating major causes of blindness, including cataract, glaucoma, and refractive errors.

**Why the Correct Answer is Right**
The correct answer to the question is not provided. However, I can still explain the concept of "centre of excellence" in the context of Vision 2020. A centre of excellence is a specialized facility or institution that provides high-quality eye care services, including surgeries, diagnostic tests, and treatment for various eye diseases. These centres are equipped with modern technology and staffed by experienced ophthalmologists and other healthcare professionals.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** There is no information available on the number of centres of excellence under Vision 2020.
**Option C:** This option is not provided.
**Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
Vision 2020 has been successful in reducing the number of people living with avoidable blindness in many parts of the world. It has also helped to improve eye care services and increase awareness about the importance of eye health.

**Correct Answer:** (Please provide the correct answer)