论文部分内容阅读
视觉器官(眼睛)主要的部分是眼球。眼球由眼球壁及折光装置(包括角膜、房水、晶状体和玻璃体)构成。外界物体反射的光线通过角膜、房水、晶状体和玻璃体,到达视网膜上,形成物象,物象刺激视网膜上感光细胞使之兴奋,沿视神经传到大脑皮层中枢就产生了看见物象的视觉。幼儿眼的特点1.眼球前后径较短,往往远视。经测定95%的新生儿是远视。但随年龄的增长,儿童远视逐渐减少。2.晶状体较大并富于弹性,具有较强的调节能
The main part of the visual organ (eye) is the eyeball. Eye by the eye wall and refractive devices (including cornea, aqueous humor, lens and vitreous). External objects reflect light through the cornea, aqueous humor, lens and vitreous, reaching the retina, the formation of objects, objects to stimulate the photoreceptor cells on the retina to make it excited along the optic nerve to the cerebral cortex produced vision to see the object. The characteristics of children eye 1. Eye diameter before and after shorter, often hyperopia. 95% of newborns are hyperopia. But with age, children’s hyperopia gradually reduced. 2. Larger and more flexible lens, with a strong regulatory energy