偏食作为一种不良的饮食习惯,在儿童中普遍存在。但长期偏食不但会引起厌食,营养不良,还会危害儿童视力。首先,有的孩子偏爱甜食,而吃糖过多就会对视力造成一定危害。因为糖属酸性物质,在体内代谢过程中会消耗大最的碱性物质——钙与维生素B_1。据测定,每摄入6克糖就能耗尽1400毫升牛奶中所含的钙质。而体内钙不足,会使血液渗透压降低,导致晶状体和眼房 Partial eclipse as a bad diet, ubiquitous in children. However, long-term partial eclipse will not only cause anorexia, malnutrition, but also endanger children’s vision. First of all, some children prefer sweet food, while too much sugar will cause some harm to sight. Because of the saccharinic acid, it consumes the most alkaline substances in the metabolism - calcium and vitamin B_1. It is determined that each intake of 6 grams of sugar can be depleted of calcium contained in 1400 ml of milk. The lack of calcium in the body, will reduce the blood pressure, leading to the lens and the eye room