Vitamin A deficiency occurs when the body does not get enough vitamin A, an essential nutrient important for vision, immune function, and skin health. This deficiency can lead to various health issues, including night blindness and an increased risk of infections. It is particularly common in developing countries where diets may lack sufficient sources of this vitamin. Symptoms of vitamin A deficiency can also include dry skin, dry eyes, and in severe cases, complete blindness. Foods rich in vitamin A include liver, fish, dairy products, and colorful fruits and vegetables like carrots and sweet potatoes. Addressing this deficiency often involves dietary changes or supplementation.