National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University (N.L., Y.S., M.Y., J.M., Y.L., R.D.), Wenzhou ; and Vision X Medical Technology Co., Ltd (B.C.), Shanghai, China.
Eye Contact Lens. 2024 Jan 1;50(1):23-28. doi: 10.1097/ICL.0000000000001032. Epub 2023 Sep 15.
To measure the corneoscleral limbus and anterior sclera parameters of normal Chinese adults by swept-source optical coherence tomography (OCT).
In this cross-sectional study, a total of 56 Chinese subjects with ametropia were evaluated in the Eye Hospital of Wenzhou Medical University from September 2020 to December 2020, including 26 (46.4%) men, with an average age of 24.7±1.8 years old. The OCT SS-1000 (CASIA, Tomey, Tokyo, Japan) was used to measure the sagittal height, corneoscleral junction (CSJ) angle, and scleral angle.
The chord was across the corneal center and the line connecting the center of the cornea and the center of the chord was perpendicular to the chord. The mean sagittal height at chord lengths of 10.0, 12.3, and 15.0 mm were 1,756±72, 2,658±110, and 3,676±155 μm, respectively. The absolute values of the differences between horizontal and vertical meridians at three chord lengths were 54±40, 70±67, and 117±95 μm, respectively. One-way analysis of variance showed that the differences of CSJ angles at 12.3-mm chord and scleral angles at 15.0-mm chord in the four segments were statistically significant ( F values were 32.01 and 13.37, respectively, both P <0.001). The CSJ angles from low to high were 176.53±2.14° (nasal), 178.66±1.84° (inferior), 179.13±1.20° (temporal), and 179.31±1.68° (superior), and 87.5% of the nasal angles were less than 179°. The scleral angles from high to low were 38.35±2.47° (temporal), 38.26±3.37° (superior), 35.37±3.10° (nasal), and 35.30±4.71° (inferior).
The morphology of corneoscleral limbus and anterior sclera is asymmetrical in normal Chinese adults. The nasal side of the corneoscleral limbus has the largest angle, and the superior and temporal sides of the scleral angle are larger.
应用扫频源光学相干断层扫描（OCT）测量中国成年人角巩膜缘和前巩膜参数。
本研究为横断面研究，于 2020 年 9 月至 2020 年 12 月在温州医科大学附属眼视光医院纳入 56 例屈光不正的中国成年人，其中男 26 例（46.4%），平均年龄 24.7±1.8 岁。采用 SS-1000 扫频源 OCT（CASIA，Tomey，东京，日本）测量矢状高度、角巩膜缘夹角（CSJ）和巩膜角。
测量时，光带穿过角膜中央，连接角膜中心和光带中心的直线与光带垂直。在 10.0、12.3 和 15.0mm 光带长度处，角膜矢状高度的平均值分别为 1756±72μm、2658±110μm 和 3676±155μm。在三条光带上，水平子午线和垂直子午线之间的绝对值差异分别为 54±40μm、70±67μm 和 117±95μm。单因素方差分析显示，12.3mm 光带处 CSJ 角和 15.0mm 光带处巩膜角在 4 个节段的差异均有统计学意义（F 值分别为 32.01 和 13.37，均 P<0.001）。CSJ 角由低至高分别为 176.53±2.14°（鼻侧）、178.66±1.84°（下侧）、179.13±1.20°（颞侧）和 179.31±1.68°（上侧），87.5%的鼻侧角小于 179°。巩膜角由高至低分别为 38.35±2.47°（颞侧）、38.26±3.37°（上侧）、35.37±3.10°（鼻侧）和 35.30±4.71°（下侧）。
中国成年人角巩膜缘和前巩膜形态不对称，角巩膜缘鼻侧角度最大，巩膜角的上侧和颞侧角度较大。
