Does Carrot Improve Eyesight?

Does vitamin A deficiency cause permanent blindness and how does it happen?
How does beta-carotene from carrots support tissue growth in the body?
How does the body regenerate rhodopsin, the pigment needed for night vision, and why is vitamin A important for this process?
Can carrots help reduce the risk of certain cancers, and what is the mechanism behind this?
What is the fiber content of carrots, and what are the potential health benefits of consuming dietary fiber?
Can high intake of beta-carotene from carrots increase the risk of cancer?
What other fruits and vegetables are similar to carrots in terms of nutritional value and composition?
How does rhodopsin work to enable vision in low-light conditions?