Which one of the following is not a target disease under &;Vision 2020: The Right to Sight&;-
**Core Concept**
Vision 2020: The Right to Sight 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. It aims to address the major causes of blindness and visual impairment in low- and middle-income countries.
**Why the Correct Answer is Right**
The correct answer is not explicitly stated in the question, but I will provide the options to explain the correct answer. Assuming the options are: A. Cataract, B. Refractive errors, C. Diabetic retinopathy, D. Age-related macular degeneration, Vision 2020 specifically targets refractive errors, cataract, and other causes of avoidable blindness, but it does not primarily focus on diabetic retinopathy or age-related macular degeneration, which are more common in high-income countries.
**Why Each Wrong Option is Incorrect**
* **Option A:** Cataract is a major cause of blindness worldwide and is a target disease under Vision 2020.
* **Option B:** Refractive errors are a leading cause of visual impairment in children and adults, and Vision 2020 specifically targets their correction.
* **Option C:** Diabetic retinopathy is a significant cause of blindness in people with diabetes, but it is not a primary target disease under Vision 2020.
* **Option D:** Age-related macular degeneration is a common cause of blindness in older adults, but it is not a primary target disease under Vision 2020.
**Clinical Pearl / High-Yield Fact**
Vision 2020 aims to integrate eye care into primary healthcare systems and to strengthen the capacity of eye care services in low- and middle-income countries.
**Correct Answer:** D.