Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, South Korea.
Corneal Dystrophy Research Institute, Department of Ophthalmology, Severance Hospital, Yonsei University, Seoul, Republic of Korea.
Sci Rep. 2022 Mar 8;12(1):4087. doi: 10.1038/s41598-022-08194-0.
To investigate keratometric measurements according to axial length in an aged population. Patients requiring cataract surgery with keratometric measurements from four different ophthalmic devices (autorefractor/keratometer, Scheimpflug imaging, corneal topography/ray-tracing aberrometry, and partial coherence interferometry) between January 2016 and March 2021 were reviewed retrospectively. Cases for which four ophthalmic devices were deployed in the same order a day were included in this investigation. The corneal curvature of the flattest and steepest meridian, mean corneal curvature, corneal astigmatism, steepest axis location, and axial length were evaluated. In total, 250 eyes (137 patients) were included in the analysis. A negative correlation was found between mean corneal curvature and axial length, with correlation coefficients of 0.587, 0.592, 0.588, 0.591, 0.588, and 0.562 for autorefractor/keratometer, Scheimpflug imaging, corneal topography/ray-tracing aberrometry, partial coherence interferometry, total corneal refractive power of Scheimpflug imaging, and simulated keratometry of corneal topography/ray-tracing aberrometry measurements, respectively. No statistically significant differences were found for corneal astigmatism according to axial length. In axial length group of less than 26.0 mm, negative correlation was found between axial length and mean frontal corneal curvature while no correlation was found between axial length and corneal astigmatism. All four ophthalmic devices showed good inter-device reliability for mean corneal curvature but not corneal astigmatism.
研究老年人群中角膜曲率与眼轴长度的关系。回顾性分析了 2016 年 1 月至 2021 年 3 月期间，250 只眼（137 例患者）使用四种不同眼科设备（自动验光仪/角膜曲率计、Scheimpflug 成像、角膜地形图/光线追踪像差仪和部分相干干涉仪）进行的角膜曲率测量值。纳入标准为同一天按照相同顺序使用四种眼科设备的病例。评估了最平坦和最陡峭子午线的角膜曲率、平均角膜曲率、角膜散光、最陡峭轴位置和眼轴长度。平均角膜曲率与眼轴长度呈负相关，自动验光仪/角膜曲率计、Scheimpflug 成像、角膜地形图/光线追踪像差仪、部分相干干涉仪、Scheimpflug 成像的总角膜屈光力和角膜地形图/光线追踪像差仪的模拟角膜曲率测量值的相关系数分别为 0.587、0.592、0.588、0.591、0.588 和 0.562。根据眼轴长度，角膜散光无统计学差异。在眼轴长度小于 26.0mm 的组中，眼轴长度与平均前角膜曲率呈负相关，而与角膜散光无相关性。四种眼科设备的平均角膜曲率具有良好的设备间可靠性，但角膜散光的可靠性较差。
