Catarct is a kind of common disease which can cause blindness in the world.It occurs when proteins and lipids of crystalline lens are injured by oxidization.

• 白内障是一种常见的世界性致盲性疾病，由于晶状体内氧化和抗氧化系统失去平衡，晶状体内的蛋白质和脂质受到氧化损伤所致。