Term Definition Anisometropia Visual disparity existing between the two eyes Aphakic The absence of the lens within the eye due to surgical removal or congenital absence Cornea The clear window in front of the eye that helps protect the interior of the eyeball Corneal Ectasia Weakening of the cornea causes it to bulge and protrude forward, resulting in distorted vision Diopter A unit used to measure correction, or the focusing power of the镜头一个人的眼睛需要远视也是远视,一个人可以很好地看到遥远的物体,但很难专注于近距离物体。在此折射误差中,由于眼球的镜头短于正常镜头,因此进入视网膜后面的光线焦点是部分流离失所的镜头,但仍留在镜头空间内,近视近视也被称为近视镜,在该镜头空间中,一个人将难以阅读道路标志并清楚地看到远处的物体。这是最常见的折射率误差,由于眼球的折射太长,光线聚焦在视网膜前方的位置。眼睛弯曲光线的角膜和镜头专注于视网膜折射误差大小和与形状相关的眼睛的异常,这些异常会影响眼睛将眼睛聚焦在视网膜视网膜上的能力,该视网膜在视网膜视网膜上的眼球背面由光敏感细胞组成,这些细胞由光敏感细胞组成,这些细胞通过NERVER向大脑触发的脑电图传播,从而通过NERVER向大脑进行启动信息