[2] [2] Trivedi R H, Wilson M E. Selection of an initial contact lens power for infantile cataract surgery without primary intraocular lens implantation［J］. Ophthalmology. 2013(120): 1973-1976.

[3] [3] Javal E. Memoires d’Ophthalmometrie. G. Masson, ed. Paris: Librarie de l’Academie de Medecine; 1890: 130-131.

[4] [4] Grosvenor T, Quintero S, Perrigin D M. Predicting refractive astigmatism: a suggested simplification of Javal’s rule［J］. Am J Optom Physiol Opt, 1988(65): 292-297.

[5] [5] Grosvenor T, Ratnakaram R. Is the relation between keratometric astigmatism and refractive astigmatism linear［J］. Optom Vis Sci 1990(67): 606-609.

[6] [6] Auger P. Confirmation of the simplified Javal’s rule［J］. Am J Optom Physiol Opt, 1988(65): 915.

[7] [7] Keller P R, Collins M J, Carney L G, et al. The relation between corneal and total astigmatism［J］. Optom Vis Sci 1996(73): 86-91.

[11] [11] Jaffe N S, Clayman H M. The pathophysiology of corneal astigmatism after cataract extraction［J］. Trans Am AcadOphthalmolOtolaryngol, 1975, 79(OP): 615-630.

[12] [12] Naeser K. Conversion of keratometer readings to polar values［J］. J Cataract Refract Surg, 1990, 16(6): 741-745.

[13] [13] Naeser K, Hjortdal J O. Bivariate analysis of surgically induced regular astigmatism［J］. Mathematical analysis and graphical display, Ophthalmic Physiol Opt., 1999, 19(1): 50-61.

[14] [14] Cravy T V. Calculation of the change in corneal astigmatism following cataract extraction［J］. Ophthalmic Surg., 1979, 10(1): 38-49.

[15] [15] Thibos L N, Wheeler W, D Horner. Power vectors: an application of Fourier analysis to thedescription and statistical analysis of refractive error［J］. Optom Vis Sci., 1997, 74(6): 367-375. .

[16] [16] Thibos L N, Horner D. Power vector analysis of the optical outcome of refractive surgery［J］. J Cataract Refract Surg., 2001, 27(1): 80-85.

[17] [17] Giuliano de Oliveira Freitas, Renato Ambrósio Jr, Isaac Ramos. Astigmatic Vector Analysis of Posterior Corneal Surface: A Comparison Among Healthy, FormeFruste, and Overt Keratoconic Corneas［J］. Am J Ophthalmol, 2016, 167: 65-71.

[18] [18] Remón Laura, Benlloch Josefa, Furlan Walter D. Corneal and Refractive Astigmatism in Adults: A Power Vectors Analysis［J］. Optometry and Vision Science: October 2009, 86(10): 1182-1186

[19] [19] Tong L, Carkeet A, Saw S M, et al. Corneal and refractive error astigmatism in Singaporean school children: a vector-based Javal’s rule［J］. Optom Vis Sci., 2001(78): 881-887.

[20] [20] Shankar S, Bobier W R. Corneal and lenticular components of total astigmatism in a preschool sample［J］. Optom Vis Sci., 2004(81): 536-542.