The blueberry lutein ester purchased online for 6 yuan is not genuine. Genuine blueberry lutein esters are priced between 70 yuan and 150 yuan. It is impossible to buy them for 6 yuan, so buying blueberry lutein esters online for 6 yuan is not genuine. Blueberry lutein ester has the function of filtering blue light and antioxidant, which plays a better nutritional role in the growth and development of the eyes. It can also prevent damage to the eyes caused by ultraviolet and blue light radiation from electronic products, thereby protecting the eyes.