Wang F R, Zhou X D, Zhou S Z
Department of Ophthalmology, Jinshan Hospital, Shanghai Medical University.
Zhonghua Yan Ke Za Zhi. 1994 Jan;30(1):39-40.
Ocular biometry in 255 eyes (131 subjects) with CT scan revealed that the length of the antero-posterior axis was 23.63 +/- 0.92 mm in hyperopia, 24.62 +/- 0.38 mm in emmetropia and 26.68 +/- 0.75 mm in myopia, and the length of the horizontal transverse axis was correspondingly 24.61 +/- 0.53 mm, 24.91 +/- 0.37 mm and 25.12 +/- 0.73 mm. There were significant differences among groups of different refractions, and the axial length increased with the severity of myopia. It was evident that refractive errors were chiefly caused by the varying axial lengths. The authors propose the parameter of the ocular diametrical ratio which is the ratio of the anteroposterior axis to the horizontal transverse axis, and accordingly hyperopia has a ratio under 1, myopia a ratio over 1 and an emmetropic eye is apparently spherical with the ratio in the vicinity of 1. The authors point out that the refractive state is determined by the ocular diametrical ratio.
对255只眼睛（131名受试者）进行的眼部生物测量及CT扫描显示，远视眼的眼轴长度为23.63±0.92毫米，正视眼为24.62±0.38毫米，近视眼为26.68±0.75毫米，相应地，水平横轴长度分别为24.61±0.53毫米、24.91±0.37毫米和25.12±0.73毫米。不同屈光组之间存在显著差异，眼轴长度随近视程度加重而增加。显然，屈光不正主要由眼轴长度的变化引起。作者提出了眼径比这一参数，即前后轴与水平横轴的比值，因此远视眼的该比值小于1，近视眼的比值大于1，正视眼的比值接近1，呈近似球形。作者指出，屈光状态由眼径比决定。
