Carrots are rich in β-carotene and lutein. β-carotene can be converted into vitamin A after entering the human body, which is conducive to the formation of vision and the prevention of night blindness; lutein can prevent age-related macular degeneration. β-carotene in carrots is the main source of vitamin A in the human body. Vitamin A is an important substance involved in maintaining the circulation of dark vision photoreceptors within the visual cells, which is conducive to the human eye’s adaptation to the dark field of vision, and also maintains the normal secretion of the cup cells within the eye. Lack of these substances can easily lead to night blindness and dry eye. Lutein in carrots is the main pigment present in the macular region of the retina of the human eye, which can help the retina to resist ultraviolet rays, maintain the durability of vision, improve visual reaction time, reduce visual damage and prevent macular degeneration. It is important to note that carrots are only food and do not have medicinal properties. Eating carrots in moderation can have a positive effect on the eyes, but if consumed in excess they can lead to carotenemia and can cause gastrointestinal distress.