Final answer:
Nightblindness is a condition caused by Vitamin A deficiency, which impacts vision in low light and is crucial for immune function. Vitamin A is fat-soluble and can be found in various foods such as carrots and leafy greens.
Step-by-step explanation:
Nightblindness, also known as nyctalopia, is a result of Vitamin A deficiency. This condition leads to an individual's inability to see well in low light or darkness, as Vitamin A is crucial for the formation of rhodopsin, a pigment found in the retina that allows vision in low-light conditions. Deficiencies in Vitamin A can also lead to more severe visual impairments and even total blindness, especially in developing countries where it is most common. Moreover, Vitamin A plays a pivotal role in the development of the immune system, making its deficiency detrimental to effectively fighting infections.
It's essential to note that Vitamin A is different from other vitamins as it is fat-soluble, not water-soluble like Vitamin C and some B-vitamins. Hence, it is stored in the body's fatty tissues and the liver. Foods rich in Vitamin A include carrots, sweet potatoes, and leafy green vegetables. Ensuring an adequate intake of these foods can help prevent deficiencies and support overall eye health.