Blueberry fruit is very high in anthocyanins, which have been linked to improved night vision, prevention of macular degeneration, anti-cancer activity, and reduced risk of heart disease.

Lutein is one of the few xanthophyll carotenoids that is found in high concentration in the macula of the human retina. As de novo synthesis of lutein within the human body is impossible, lutein can only be obtained from diet. Most importantly, as we age, the bodys natural supply of this vital carotenoid can decrease, especially if dietary intake is insufficient. Many basic and clinical studies have reported lutein's anti-oxidative and anti-inflammatory properties in the eye, suggesting its beneficial effects on protection and alleviation of ocular diseases such as age-related macular degeneration, diabetic retinopathy, retinopathy of prematurity, myopia, and cataract. Scientific evidence indicates that Lutein helps filter out high energy blue-light from the sun and artificial light（such as blue-light from a mobile phone screen）, which may otherwise induce oxidative stress and possible free radical damage to the eyes and skin.

Lutein is categorized as Generally Regarded as Safe (GRAS), posing minimal side-effects upon long-term consumption.

β-carotene is a kind of antioxidant, which has detoxification effect. It is an indispensable nutrient to maintain human health. It has significant functions in anti-cancer, prevention of cardiovascular disease, cataract and anti-oxidation. β-carotene has the function of pro-vitamin A to maintain healthy vision.