Certified Dietary Manager (CDM) Practice Exam

Vitamin A is essential for maintaining healthy vision due to its role in the formation of rhodopsin, a pigment found in the retina that is necessary for low-light and color vision. This vitamin is a crucial component in the visual cycle, helping to convert light into electrical signals that are sent to the brain, thus allowing us to perceive images.

Additionally, Vitamin A supports overall eye health by helping to maintain the integrity of eye tissues and preventing conditions such as night blindness and potentially other eye disorders. It can be found in foods such as liver, carrots, sweet potatoes, and leafy greens, emphasizing its importance in a balanced diet for vision care.

Other vitamins listed, while beneficial for overall health, do not play a direct or as significant role in vision as Vitamin A does. For example, Vitamin C supports eye health through its antioxidant properties and Vitamin E also contributes to protecting cells from damage, but they do not specifically target visual function in the same way. Vitamin D is primarily associated with bone health and calcium regulation, making Vitamin A the standout choice for maintaining healthy vision.