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Comparison of the Angle Kappa Measured by Pentacam and Keratron Scout |
Rong Shi, Wei Zhao, Zehong Dong, Lijuan Sun, Xueting Chen, Lirong Dong, Jie Feng, Yusheng Wang |
Department of Ophthalmology, Xijing Hospital, Institute of Ophthalmology of Chinese PLA, Air Force Medical University, Xi'an 710032, China |
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Abstract Objective: To investigate and analyze the difference in angle Kappa measured by Pentacam and Keratron Scout in refractive surgery patients. Methods: One hundred ninety-six eyes of 98 patients screened for refractive surgery were enrolled in this case series study. Pupil diameters and angle Kappa expressed in rectangular coordinates were measured by Pentacam and Keratron Scout. Data differences and correlation between the two examinations were compared and analyzed by a paired t test and Pearson correlation analysis. Results: Pupil diameters measured by Pentacam and Keratron Scout were 3.17±0.44 mm, 3.19±0.53 mm (right eye), and 3.25±0.65 mm, 3.33±0.48 mm (left eye), respectively. The differences between the two instruments were not significant. The horizontal and vertical offset measured by the two instruments were not statistically different. There was a significant correlation in the offset of the angle Kappa measured by the two instruments (P<0.05). The correlation coefficients of the right eye horizontal offset, right eye vertical offset, left eye horizontal offset, left eye vertical offset were 0.966, 0.969, 0.956 and 0.913, respectively. Conclusion: There is no statistically significant difference between angle Kappa measured by Pentacam and Keratron Scout when pupil diameters are consistent. Both instruments can be used as a reference for the adjustment in angle Kappa in refractive surgery.
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Received: 18 February 2019
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Corresponding Authors:
Wei Zhao, Department of Ophthalmology, Xijing Hospital, Institute of Ophthalmology of Chinese PLA, Air Force Medical University, Xi'an 710032, China (Email: weieye@126. com)
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[1] |
Khakshoor H, McCaughey MV, Vejdani AH, et al. Use of angle kappa in myopic photorefractive keratectomy. Clin Ophthalmol, 2015, 9: 193-195. DOI: 10.2147/OPTH.S70690.
|
[2] |
Prakash G, Prakash DR, Agarwal A, et al. Predictive factor and kappa angle analysis for visual satisfactions in patients with multifocal IOL implantation. Eye (Lond), 2011, 25(9): 1187- 1193. DOI: 10.1038/eye.2011.150.
|
[3] |
Harrer A, Hirnschall N, Tabernero J, et al. Variability in angle κ and its influence on higher-order aberrations in pseudophakic eyes. J Cataract Refract Surg, 2017, 43(8): 1015-1019. DOI: 10. 1016/j.jcrs.2017.05.028.
|
[4] |
Arba Mosquera S, Verma S, McAlinden C. Centration axis in refractive surgery. Eye Vis (Lond), 2015, 2: 4. DOI: 10.1186/ s40662-015-0014-6.
|
[5] |
Summers CG, King RA, Merrill KS, et al. Positive angle kappa in albinism. Am J Ophthalmol, 2004, 138(6): 1093. DOI: 10. 1016/j.ajo.2004.08.024.
|
[6] |
Hashemi H, KhabazKhoob M, Yazdani K, et al. Distribution of angle kappa measurements with Orbscan II in a populationbased survey. J Refract Surg, 2010, 26(12): 966-971. DOI: 10. 3928/1081597X-20100114-06.
|
[7] |
冯旺强, 郑海华, 蔡剑秋. Kappa角对近视屈光手术偏心量的影响. 实用医学杂志, 2010, 26(8): 1348-1350. DOI: 10.3969/j. issn.1006-5725.2010.08.027.
|
[8] |
Chang DH, Waring GO 4th. The subject-fixated coaxially sighted corneal light reflex: A clinical marker for centration of refractive treatments and devices. Am J Ophthalmol, 2014, 158(5): 863-874. DOI: 10.1016/j.ajo.2014.06.028.
|
[9] |
De Bernardo M, Borrelli M, Mariniello M, et al. Pentacam vs SP3000P specular microscopy in measuring corneal thickness. Cont Lens Anterior Eye, 2015, 38(1): 21-27. DOI: 10.1016/j. clae.2014.08.006.
|
[10] |
Rodríguez-Vallejo M, Piñero DP, Fernández J. Avoiding misinterpretations of Kappa angle for clinical research studies with Pentacam. J Optom, 2019, 12(2): 71-73. DOI: 10.1016/j. optom.2018.03.003.
|
[11] |
赵炜, 董泽红, 冯洁, 等. 前节OCT和Pentacam及A超在测量角膜厚度上的比较. 国际眼科杂志, 2013(12): 2551-2553. DOI: 10.3980/j.issn.1672-5123.2013.12.59.
|
[12] |
Penna RR1, de Sanctis U1, Catalano M1, et al. Placido diskbased topography versus high-resolution rotating Scheimpflug camera for corneal power measurements in keratoconic and postLASIK eyes: Reliability and agreement. Int J Ophthalmol, 2017, 10(3): 453-460. DOI: 10.18240/ijo.2017.03.20. eCollection 2017.
|
[13] |
Hidalgo IR, Rozema JJ, Dhubhghaill SN, et al. Repeatability and inter-device agreement for three different methods of keratometry: Placido, Scheimpflug, and color LED corneal topography. J Refract Surg, 2015, 31(3): 176-181. DOI: 10. 3928/1081597X-20150224-01.
|
[14] |
Moshirfar M, Hoggan RN, Muthappan V. Angle Kappa and its importance in refractive surgery. Oman J Ophthalmol, 2013, 6(3): 151-158. DOI: 10.4103/0974-620X.122268.
|
[15] |
Kymionis GD, Panagopoulou SI, Aslanides IM, et al. Topographically supported customized ablation for the management of decentered laser in situ keratomileusis. Am J Ophthalmol, 2004, 137(5): 806-811. DOI: 10.1016/j.ajo.2003. 11.077.
|
[16] |
孙丽霞, 熊露, 张日平, 等. Pentacam、iTrace和Orbscan IIz测量近视眼角膜前表面Q值和屈光力的一致性. 中华眼视光学 与视觉科学杂志, 2013, 15(3): 142-145. DOI: 10.3760/cma.j. issn.1674-845X.2013.03.004.
|
[17] |
黄锦海, 李坚, 鲁伟聪, 等. Lenstar、Pentacam与Sirius测量白内障患者眼前节生物参数的比较.中华眼视光学与视觉 科学杂志, 2014, 16(1): 30-35. DOI: 10.3760/cma.j.issn.1674- 845X.2014.01.007.
|
[18] |
林巧雅, 李学喜, 黄雪丽. Pentacam和Topolyzer测量Kappa角的比较.中国实用眼科杂志, 2017, 35(6): 576-578. DOI: 10. 3760/cma.j.issn.1006-4443.2017.06.007.
|
[19] |
Domínguez-Vicent A1, Monsálvez-Romín D, Pérez-Vives C, et al. Measurement of angle Kappa with Orbscan II and Galilei G4: Effect of accommodation. Graefes Arch Clin Exp Ophthalmol, 2014, 252(2): 249-255. DOI: 10.1007/s00417-013- 2509-y.
|
|
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