Abstract：Corneal curvature radius, corneal refractive power and astigmatic axis are key parameters for evaluation of human corneal topography. In order to accurately measure and trace the human cornea parameters, based on the principle of human corneal reflection imaging, a series of standards for human corneal parameters were developed for the first time in the form of spherical and toroidal surface design. For curvature radius the measurement range is (5.5～10.0) mm and uncertainty is 0.002mm (k=2). While for axis the measurement range is (0°~180°) and uncertainty is 1° (k=2). Moreover, national standard for ophthalmometers has been established and traceability system for corneal parameters has been formed. Experimental results showed that the measurement standard and traceability system can meet the requirements of calibration and traceability of human corneal parameter instrument, and guarantee the accuracy of corneal parameter measurement.
［1］ISO 10343-2014 Ophthalmic instruments—Ophthalmometers［S］. 2014.
［2］JJG 1011-2018 角膜曲率计［S］. 2018.
［3］JJG 1088-2013 角膜曲率计用计量标准器［S］. 2019.
［4］张吉焱, 王莉茹, 陈燕. 角膜曲率计计量标准器的研制［J］. 计量学报, 2006, 27(1): 28-31.
Zhang J Y, Wang l R, Chen Y. The development of standard devices for ophthalmometers［J］. Acta Metrologica Sinica, 2006, 27(1): 28-31.
［5］ISO 13666-2012 Ophthalmic optics—Spectacle lenses—Vocabulary［S］. 2012.
［6］GB/T 26397-2011 眼科光学 术语［S］. 2011.
［7］张以谟. 应用光学［M］. 北京: 电子工业出版社, 2010:26, 364, 482-498.
［8］张吉焱, 洪宝玉, 高明亮. 样板检验法测量角膜曲率计用计量标准器的不确定度评定［J］. 计量技术, 2013, (9): 47-50.
Zhang J Y, Hong B Y, Gao M L. Uncertainty evaluation for standard devices of ophthaomometers by using sample test method［J］. Measurement technique, 2013, (9): 47-50.
［9］张吉焱, 李姣, 高明亮, 等. 角膜曲率计轴位标准器的研制［J］. 计量学报, 2017, 38(3): 276-279.
Zhang J Y, Li J, Gao M L. The development of axial standard device for calibration of ophthalmometers［J］. Acta Metrologica Sinica, 2017, 38(3): 276-279.
2020, Vol. 41 
