视觉器官眼球,在胎生期最早形成结构框架时还没有视觉功能,婴儿出生后在外界光线刺激中飞快成长发育,尤其是感光屏幕视网膜,由视细胞和传递神经纤维组成的黄斑区,接受光线刺激发育最快,生后5个月左右,黄斑中心发育基本完善,感光能力逐渐提高。孩子3—4岁时眼球和球内组织发育成 Visual organ eyeballs, the earliest birth of the structural framework of the formation of the frame does not yet have visual function, the baby after birth in the rapid development of external light stimulus, especially the photosensitive screen retina, the optic nerve cells and the optic nerve cells composed of macular area, subject to light stimulation The fastest development, about 5 months after birth, macular center developed basically improved, photosensitivity gradually increased. 3-4 years old children when the eye and ball tissue development into