Objective: To evaluate the safety, effectiveness, predictability, stability, and centrality of the automatic location tracking system contoura for the correction of ametropia with mild irregular astigmatism.Methods: In this prospective study, 23 consecutive patients (40 eyes) with ametropia and mild irregular astigmatism were studied from March to June 2016 at Hangzhou MSK Eye Hospital. Corrective surgery was performed using contoura, an automatic location tracking system. Uncorrected visual acuity, best corrected visual acuity, manifest refraction, and three-dimensional corneal topography were quantitatively assessed preoperatively and at 1 day, 2 weeks, and 3 months postoperatively. The results were analyzed with Pearson correlation analysis and one-way analysis of variance. Results: At 1 day, 2 weeks, and 3 months postoperatively, uncorrected visual acuity was -0.04±0.08, -0.06±0.08, -0.06±0.08 respectively.For all eyes, the best corrected visual acuity was equal to or higher than the preoperative values, and 32.5% of the eyes improved by 1 line while 2.5% improved by 2 lines at 3 months postoperatively. The actual corrected spherical equivalent was positively correlated with the predicted correction (r =0.999,P < 0.001). For residual spherical equivalent, all eyes were within ±0.50 D and 37.5% were within ±0.25 D.Uncorrected visual acuity and spherical equivalent were not statistically significant at each time point. The eccentric distances was statistically significant between 1 day and 3 months postoperatively (P=0.02).There were no significant differences among the remaining time points. All operations were successful, and no serious complications were seen during the 3-month postoperative period. Conclusions: The automatic positioning and tracking system contoura is safe, effective, predictive, stable, and centered for correction of ametropia with mild irregular astigmatism.
张君,郑历,赵霞,许扬,林汉俊,毛洪倩. Contoura矫正屈光不正伴轻度角膜不规则散光的临床效果[J]. 中华眼视光学与视觉科学杂志, 2018, 20(4): 216-221.
Jun Zhang,Li Zheng,Xia Zhao,Yang Xu,Hanjun Lin,Hongqian Mao. Clinical Study of the Contoura Automatic Location Tracking System for Correction of Ametropia with Mild Irregular Astigmatism. Chinese Journal of Optometry Ophthalmology and Visual science, 2018, 20(4): 216-221. DOI: 10.3760/cma.j.issn.1674-845X.2018.04.005
Somani S, Tuan KA, Chernyak D. Corneal asphericity and retinal image quality: a case study and simulations. J Refract Surg, 2004, 20(5): S581-585.
[2]
Amigó A, Bonaque-González S, Guerras-Valera E. Control of induced spherical aberration in moderate hyperopic LASIK by customizing corneal asphericity. J Refract Surg, 2015, 31(12):802-806. DOI: 10.3928/1081597X-20151111-03.
[1]
Somani S, Tuan KA, Chernyak D. Corneal asphericity and retinal image quality: a case study and simulations. J Refract Surg, 2004, 20(5): S581-585.
[2]
Amigó A, Bonaque-González S, Guerras-Valera E. Control of induced spherical aberration in moderate hyperopic LASIK by customizing corneal asphericity. J Refract Surg, 2015, 31(12):802-806. DOI: 10.3928/1081597X-20151111-03.
[3]
Goyal JL, Garg A, Arora R, et al. Comparative evaluation of higher-order aberrations and corneal asphericity between wavefront-guided and aspheric LASIK for myopia. J Refract
Pajic B, Vastardis I, Pajic-Eggspuehler B, et al. Femtosecond laser versus mechanical microkeratome-assisted flap creation for LASIK: a prospective, randomized, paired-eye study. ClinOphthalmol, 2014, 8(9): 1883-1889. DOI: 10.3928/1081597X-20141021-10.
[5]
Mysore N, Krueger R. Advances in refractive surgery: May 2013 to June 2014. Asia Pac J Ophthalmol (Phila), 2015, 4(2):112-120. DOI: 10.3928/1081597X-20141021-10.
[6]
Bamashmus MA, Hubaish K, Alawad M, et al. Functional outcome and patient satisfaction after laser in situ keratomileusis for correction of myopia and myopic astigmatism. Middle East Afr J Ophthalmol, 2015, 22(1): 108-114. DOI: 10.4103/0974-9233.148359.
[3]
Goyal JL, Garg A, Arora R, et al. Comparative evaluation of higher-order aberrations and corneal asphericity between wavefront-guided and aspheric LASIK for myopia. J Refract
Pajic B, Vastardis I, Pajic-Eggspuehler B, et al. Femtosecond laser versus mechanical microkeratome-assisted flap creation for LASIK: a prospective, randomized, paired-eye study. ClinOphthalmol, 2014, 8(9): 1883-1889. DOI: 10.3928/1081597X-20141021-10.
[5]
Mysore N, Krueger R. Advances in refractive surgery: May 2013 to June 2014. Asia Pac J Ophthalmol (Phila), 2015, 4(2):112-120. DOI: 10.3928/1081597X-20141021-10.
[6]
Bamashmus MA, Hubaish K, Alawad M, et al. Functional outcome and patient satisfaction after laser in situ keratomileusis for correction of myopia and myopic astigmatism. Middle East Afr J Ophthalmol, 2015, 22(1): 108-114. DOI: 10.4103/0974-9233.148359.
Motwani M. The use of WaveLight? Contoura to create a uniform cornea: the LYRA Protocol. Part 3: the results of 50 treated eyes. Clin Ophthalmol, 2017, 16(5): 915-921. DOI:
Motwani M. The use of WaveLight? Contoura to create a uniform cornea: the LYRA Protocol. Part 3: the results of 50 treated eyes. Clin Ophthalmol, 2017, 16(5): 915-921. DOI:
10
2147/OPTH.S133841.
10
2147/OPTH.S133841.
[9]
Falavarjani KG, Hashemi M, Modarres M, et al. Topography-Guided vs. Wavefront-Optimized Surface Ablation for Myopia Using the WaveLight Platform: A Contralateral Eye Study. J
Holland S, Lin DT, Tan JC. Topography-guided laser refractive surgery. Curr Opin Ophthalmol, 2013, 24(4): 302-309. DOI:10.1097/ICU.0b013e3283622a59.
[9]
Falavarjani KG, Hashemi M, Modarres M, et al. Topography-Guided vs. Wavefront-Optimized Surface Ablation for Myopia Using the WaveLight Platform: A Contralateral Eye Study. J
Holland S, Lin DT, Tan JC. Topography-guided laser refractive surgery. Curr Opin Ophthalmol, 2013, 24(4): 302-309. DOI:10.1097/ICU.0b013e3283622a59.
[11]
El AHE, Ghanem AA, Saleh SM. Wavefront-optimized ablation versus topography-guided customized ablation in myopic LASIK: comparative study of higher order aberrations.
D i c k H B , K a i s e r S . D y n a m i c a b e r r o m e t r y d u r i n g accommodation of phakic eyes and eyes with potentially accommodative intraocular lenses. Ophthalmologe, 2002,99(11): 825-834. DOI: 10.1007/s00347-002-0737-3.
El AHE, Ghanem AA, Saleh SM. Wavefront-optimized ablation versus topography-guided customized ablation in myopic LASIK: comparative study of higher order aberrations.
D i c k H B , K a i s e r S . D y n a m i c a b e r r o m e t r y d u r i n g accommodation of phakic eyes and eyes with potentially accommodative intraocular lenses. Ophthalmologe, 2002,99(11): 825-834. DOI: 10.1007/s00347-002-0737-3.
Amano S, Tanaka S, Shimizu K. Topographical evaluation of centration of excimer laser myopic photorefractive keratectomy.J Cataract Refract Surg, 1994, 20(6): 616-619.
[15]
Amano S, Tanaka S, Shimizu K. Topographical evaluation of centration of excimer laser myopic photorefractive keratectomy.J Cataract Refract Surg, 1994, 20(6): 616-619.
[16]
Lee DH, Seo S, Jeong KW, et al. Early spatial changes in the posterior corneal surface after laser in situ keratomileusis. J Cataract Refract Surg, 2003, 29(4): 778-784.
[16]
Lee DH, Seo S, Jeong KW, et al. Early spatial changes in the posterior corneal surface after laser in situ keratomileusis. J Cataract Refract Surg, 2003, 29(4): 778-784.