色彩艳丽的玩具能刺激婴幼儿的视力发育。新生儿的视力,不到成人的1%,直到5岁,视力才与成人相仿。因而,5岁以内的婴幼儿是视力训练的重要时期。需要让孩子的眼睛不断接触外界物体的刺激,激发视网膜上视觉细胞的功能发育,逐步完善正常视力。玩具,不仅能吸引幼儿好奇心,而且有利于启发提高他们的想象力与智慧。更重要的是儿童处在视力发育阶段,刺激他们的视觉细胞,能促进视力的良好发育。然而,五彩缤纷的玩具,却潜伏着危害儿童健康的因素,正在受到医学家的关注。原来多彩的塑料玩具之所以保持不褪色,是因为塑料中含有金属离子化合物。不同的金属离子呈现不同的颜色:铝呈现奶黄色;镉呈大红、黄色;铬化物呈绿色和朱红色。镉、铅、铬是毒性较高的物质,被幼儿吸收会损害肝、肾、脑、骨骼组织,损害神经功能和消化系统,导致幼儿抗病能力下 Colorful toys can stimulate infant vision development. Vision of newborns, less than 1% of adults, until the age of 5, visual acuity and adults are similar. Thus, infants and young children within 5 years of age is an important period of vision training. Need to keep the child’s eyes in constant contact with the stimulation of the external objects, stimulate the visual development of retinal cells, and gradually improve the normal vision. Toys, not only to attract young children curiosity, but also help enlighten and enhance their imagination and wisdom. More importantly, children are in the stage of vision development, stimulate their visual cells, can promote the good development of vision. However, colorful toys, but lurking the factors that endanger the health of children, are being the concern of medical scientists. The reason why the original colorful plastic toys do not fade, because the plastic contains metal ion compounds. Different metal ions show different colors: aluminum is cream-colored, cadmium is red and yellow, and chrome is green and vermilion. Cadmium, lead and chromium are highly toxic substances that are absorbed by young children and can damage the liver, kidney, brain and bone tissues, impair nerve function and digestive system, and lead to lower disease resistance in young children