What does Vitamin A protect children from?

MP CHO -2019 (Shift-1)

Applied Nutrition & Dietetics

Easy

Appeared in: MP CHO -2019 (Shift-1)

Explanation

Vitamin A is essential for maintaining the health of the conjunctiva and cornea, and for producing retinal pigments required for vision in dim light.
A deficiency of Vitamin A leads to a condition called xerophthalmia, which literally means 'dry eye' and includes a range of ocular signs from night blindness to corneal destruction.
Protecting children with Vitamin A supplementation is a key public health strategy to prevent nutritional blindness.

Option A: Myopia, or nearsightedness, is a refractive error related to the physical shape of the eye (elongated eyeball or excessive corneal curvature). It is not caused by a nutritional deficiency.
Option B: Hypermetropia, or farsightedness, is a refractive error caused by a shortened eyeball or insufficient lens power. It has no connection to Vitamin A status.
Option D: Cretinism is a severe form of congenital hypothyroidism resulting from iodine deficiency during fetal development or infancy. It affects physical and mental growth and is unrelated to Vitamin A.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain The role of Vitamin A in preventing deficiency disorders, specifically ocular manifestations as background academic context rather than a clinical decision trigger.
Nurses are central to the prevention of xerophthalmia through the administration of Vitamin A supplements as per the national immunization schedule.
Patient education is a key nursing role. Nurses should advise caregivers on incorporating Vitamin A-rich foods (e.g., dark green leafy vegetables, yellow/orange fruits and vegetables, eggs, and liver) into a child's diet.
Early detection is vital. Nurses in community and clinical settings should be vigilant for early signs like night blindness and Bitot's spots, as prompt treatment can prevent irreversible blindness.

How to Approach the Question

First, identify the core of the question, which is asking for a condition specifically prevented by Vitamin A.
Recall the primary functions of Vitamin A. Its most well-known roles are related to vision and the health of epithelial surfaces, particularly in the eye.
Systematically evaluate each option against your knowledge of Vitamin A:
Myopia and Hypermetropia: Recognize these as refractive errors, which are problems with the eye's focusing power due to its shape, not a vitamin deficiency.
Xerophthalmia: Connect this term (meaning 'dry eye') directly to the known ocular effects of Vitamin A deficiency.
Cretinism: Recall that this is a condition related to thyroid function and iodine deficiency.

Concept Tested & Keywords

Concept Tested: The role of Vitamin A in preventing deficiency disorders, specifically ocular manifestations.
Stem keywords: Vitamin A, protect, children
Lead-in keywords: What

Q794k4cQ2eJ6Y3YpPNDvp2

E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) pp. 151-153, 178-180

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 497-499