Blueberry is a Rhododendron, a lingonberry. Originated in North America, perennial shrub small berry fruit trees. Because the fruit is blue, it is called blueberry. Blueberry fruit is rich in nutrients, which has the functions of preventing brain nerve aging, protecting eyesight, strengthening heart, fighting cancer, softening blood vessels, enhancing human body immunity, and high nutrient content. Among them, because blueberries are rich in anthocyanins, they have the effect of activating retina, which can enhance vision and prevent eye fatigue and attract attention. It is also one of the top five healthy fruits recommended by the World Food Organization. According to research by scientists in the United States, Japan, and Europe, regular consumption of blueberry products can also significantly enhance vision and eliminate eye fatigue. Medical clinical reports also show that anthocyanins in blueberries can promote rhodopsin regeneration in retinal cells, prevent myopia, and improve vision.