现在儿童开始入学时,首先是使用铅笔写字,胸部紧贴课桌,整个躯干部倾斜于一边,大拇指正好挡住视线,头又偏向一边,眼睛和桌面距离很近,为了能看清物体,眼睛的晶状体、晶状体韧带和膜状体韧带调节使眼轴变长,在儿童期间,眼睛的调节能力是很强的,因此在小学阶段未能暴露出视力不良的症状,但此时已是近视眼的潜伏阶段,随着年龄的增加,调节能力也渐渐减弱。进入初中以后,近视的程度逐渐加深,眼睛的晶状体、晶状体韧带、睫状肌韧带长期痉挛 Now when children start school, the first is to use pencil to write, chest close to the desk, the entire body tilted to one side, the thumb just block the line of sight, head and side, the distance between the eyes and desktop, in order to see objects, eyes Of the lens, the lens ligament and the membranous body ligament to adjust the longer axial length in children, the ability to regulate the eye is very strong, so in primary school failed to expose symptoms of poor vision, but this time has been myopia The latent phase, with age, regulatory capacity has gradually weakened. Into the junior high school, the degree of myopia gradually deepened, the eye lens, lens ligament, ciliary muscle ligament long-term spasm