Final answer:
Vitamin A is most recognized for maintaining eyesight, with a crucial role in vision, especially in low-light conditions and overall eye health. Deficiency leads to vision problems, while excess intake can cause adverse effects.
Step-by-step explanation:
The vitamin most known for maintaining eyesight is Vitamin A. This vitamin is essential for healthy vision, particularly in low-light conditions. Moreover, Vitamin A plays a significant role in the development of bones, teeth, and skin, while supporting the immune system and gene expression. An interesting fact is that your body can produce Vitamin A from beta-carotene, a pigment found in plants such as carrots, which is responsible for their orange color. A deficiency in Vitamin A can lead to conditions such as keratomalacia, which includes the dryness of the eye, and difficulty seeing well at night. On the other hand, too much Vitamin A can lead to hypervitaminosis, symptoms of which include nausea, vomiting, and headache.
It should be noted that Vitamins B and C are erroneously labeled as fat-soluble and associated with maintaining eyesight and blood clotting respectively. In fact, Vitamin B complex is water-soluble and supports energy production from food, nerve function, and the production of red blood cells, while Vitamin C is known for its role in immune support, wound healing, and antioxidant properties. Vitamin K, not Vitamin C, is associated with the blood clotting process.