Green fruit, if in the blue apple includes the xanthophyl or the zeaxanthin, their oxidation resistance function can cause the retina to avoid the damage, has the protection vision function.

• 绿色水果，如青苹果中含有叶黄素或玉米黄质，它们的抗氧化作用能使视网膜免遭损伤，具有保护视力的作用。