Final answer:
The micronutrient essential for improving night vision is vitamin A, not phosphorus. Vitamin A is critical for the formation of rhodopsin, a pigment in the retina that aids low light vision. A balanced diet is important for maintaining sufficient levels of essential micronutrients.
Step-by-step explanation:
The micronutrient that should be included in teaching a client who has difficulty seeing at night is vitamin A. It is essential for maintaining good vision, and a deficiency can lead to night blindness. Foods rich in vitamin A include liver, fish oils, milk, eggs, and green, orange, and yellow vegetables, such as carrots, sweet potatoes, and pumpkins. Phosphorus, while important for overall health, is not the primary nutrient associated with improving night vision. However, phosphorus can be found in many common foods, making deficiency rare.
Vitamin A plays a crucial role in the formation of rhodopsin, a pigment in the retina that is necessary for vision in low light conditions. Increasing dietary intake of vitamin A can help alleviate the symptoms of night blindness. It is important for individuals to maintain a balanced diet that includes adequate amounts of essential micronutrients that contribute to overall health, including vision health.