**Core Concept:** School Health Services play a crucial role in identifying vision problems in school children through regular screening programs. The National Programme for Control of Blindness (NPCB) recommends specific health professionals to screen students for vision issues.

**Why the Correct Answer is Right:** In India, the NPCB has designated Ophthalmologists (A) as well as Optometrists (D) to conduct vision screening in schools. Both professionals have the necessary expertise to identify vision-related problems among school children.

**Why Each Wrong Option is Incorrect:**

A. Nurses (B) are essential in maintaining overall school health but lack the specific training in eye examinations necessary to accurately detect vision issues.

D. School teachers (C) are not trained in conducting eye examinations and may miss significant vision problems during screening.

**Clinical Pearl / High-Yield Fact:** Regular vision screening by qualified professionals like Ophthalmologists and Optometrists can prevent irreversible vision loss and improve the overall educational and social outcomes of affected children.

**Correct Answer:** Ophthalmologists (A) and Optometrists (D) are the correct options to screen school students for vision problems, as they possess the necessary expertise in identifying vision-related issues.