**Core Concept**
VISION 2020 is a global initiative launched by the World Health Organization (WHO) and the International Agency for the Prevention of Blindness (IAPB) to eliminate avoidable blindness by the year 2020. The initiative focuses on various aspects of eye care, including prevention, treatment, and rehabilitation of blindness.

**Why the Correct Answer is Right**
VISION 2020 emphasizes the importance of cataract surgery, childhood blindness, and refractive errors in achieving its goals. However, the other options, while related to eye care, are not given global prominence in the VISION 2020 goals. For example, glaucoma is a significant cause of blindness, but it is not specifically highlighted in the VISION 2020 goals.

**Why Each Wrong Option is Incorrect**
**Option A:** Cataract surgery is a key component of VISION 2020, as it is the leading cause of blindness worldwide and can be effectively treated with surgery.
**Option B:** Childhood blindness is a major focus of VISION 2020, with efforts to prevent and treat conditions such as cataract, refractive errors, and retinoblastoma.
**Option D:** Refractive errors, including myopia, hyperopia, and astigmatism, are a significant cause of vision impairment and are specifically addressed in the VISION 2020 goals.

**Clinical Pearl / High-Yield Fact**
VISION 2020 highlights the importance of integrating eye care into primary healthcare systems, making eye care services more accessible and affordable for people in need.

**Correct Answer:** D. Glaucoma