Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism
This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent t...
Ausführliche Beschreibung
Autor*in: |
Wakako Ando [verfasserIn] Kazutaka Kamiya [verfasserIn] Masayuki Kasahara [verfasserIn] Nobuyuki Shoji [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2022 |
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Schlagwörter: |
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Übergeordnetes Werk: |
In: Journal of Clinical Medicine - MDPI AG, 2013, 11(2022), 1, p 240 |
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Übergeordnetes Werk: |
volume:11 ; year:2022 ; number:1, p 240 |
Links: |
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DOI / URN: |
10.3390/jcm11010240 |
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Katalog-ID: |
DOAJ010469478 |
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10.3390/jcm11010240 doi (DE-627)DOAJ010469478 (DE-599)DOAJ5e3e014a00ae43d5b0df466810d58f8e DE-627 ger DE-627 rakwb eng Wakako Ando verfasserin aut Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. corneal astigmatism surgical induced astigmatism arithmetic mean centroid glaucoma trabeculectomy Medicine R Kazutaka Kamiya verfasserin aut Masayuki Kasahara verfasserin aut Nobuyuki Shoji verfasserin aut In Journal of Clinical Medicine MDPI AG, 2013 11(2022), 1, p 240 (DE-627)718632478 (DE-600)2662592-1 20770383 nnns volume:11 year:2022 number:1, p 240 https://doi.org/10.3390/jcm11010240 kostenfrei https://doaj.org/article/5e3e014a00ae43d5b0df466810d58f8e kostenfrei https://www.mdpi.com/2077-0383/11/1/240 kostenfrei https://doaj.org/toc/2077-0383 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2022 1, p 240 |
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10.3390/jcm11010240 doi (DE-627)DOAJ010469478 (DE-599)DOAJ5e3e014a00ae43d5b0df466810d58f8e DE-627 ger DE-627 rakwb eng Wakako Ando verfasserin aut Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. corneal astigmatism surgical induced astigmatism arithmetic mean centroid glaucoma trabeculectomy Medicine R Kazutaka Kamiya verfasserin aut Masayuki Kasahara verfasserin aut Nobuyuki Shoji verfasserin aut In Journal of Clinical Medicine MDPI AG, 2013 11(2022), 1, p 240 (DE-627)718632478 (DE-600)2662592-1 20770383 nnns volume:11 year:2022 number:1, p 240 https://doi.org/10.3390/jcm11010240 kostenfrei https://doaj.org/article/5e3e014a00ae43d5b0df466810d58f8e kostenfrei https://www.mdpi.com/2077-0383/11/1/240 kostenfrei https://doaj.org/toc/2077-0383 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2022 1, p 240 |
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10.3390/jcm11010240 doi (DE-627)DOAJ010469478 (DE-599)DOAJ5e3e014a00ae43d5b0df466810d58f8e DE-627 ger DE-627 rakwb eng Wakako Ando verfasserin aut Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. corneal astigmatism surgical induced astigmatism arithmetic mean centroid glaucoma trabeculectomy Medicine R Kazutaka Kamiya verfasserin aut Masayuki Kasahara verfasserin aut Nobuyuki Shoji verfasserin aut In Journal of Clinical Medicine MDPI AG, 2013 11(2022), 1, p 240 (DE-627)718632478 (DE-600)2662592-1 20770383 nnns volume:11 year:2022 number:1, p 240 https://doi.org/10.3390/jcm11010240 kostenfrei https://doaj.org/article/5e3e014a00ae43d5b0df466810d58f8e kostenfrei https://www.mdpi.com/2077-0383/11/1/240 kostenfrei https://doaj.org/toc/2077-0383 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2022 1, p 240 |
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10.3390/jcm11010240 doi (DE-627)DOAJ010469478 (DE-599)DOAJ5e3e014a00ae43d5b0df466810d58f8e DE-627 ger DE-627 rakwb eng Wakako Ando verfasserin aut Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. corneal astigmatism surgical induced astigmatism arithmetic mean centroid glaucoma trabeculectomy Medicine R Kazutaka Kamiya verfasserin aut Masayuki Kasahara verfasserin aut Nobuyuki Shoji verfasserin aut In Journal of Clinical Medicine MDPI AG, 2013 11(2022), 1, p 240 (DE-627)718632478 (DE-600)2662592-1 20770383 nnns volume:11 year:2022 number:1, p 240 https://doi.org/10.3390/jcm11010240 kostenfrei https://doaj.org/article/5e3e014a00ae43d5b0df466810d58f8e kostenfrei https://www.mdpi.com/2077-0383/11/1/240 kostenfrei https://doaj.org/toc/2077-0383 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2022 1, p 240 |
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10.3390/jcm11010240 doi (DE-627)DOAJ010469478 (DE-599)DOAJ5e3e014a00ae43d5b0df466810d58f8e DE-627 ger DE-627 rakwb eng Wakako Ando verfasserin aut Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. corneal astigmatism surgical induced astigmatism arithmetic mean centroid glaucoma trabeculectomy Medicine R Kazutaka Kamiya verfasserin aut Masayuki Kasahara verfasserin aut Nobuyuki Shoji verfasserin aut In Journal of Clinical Medicine MDPI AG, 2013 11(2022), 1, p 240 (DE-627)718632478 (DE-600)2662592-1 20770383 nnns volume:11 year:2022 number:1, p 240 https://doi.org/10.3390/jcm11010240 kostenfrei https://doaj.org/article/5e3e014a00ae43d5b0df466810d58f8e kostenfrei https://www.mdpi.com/2077-0383/11/1/240 kostenfrei https://doaj.org/toc/2077-0383 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2022 1, p 240 |
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Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism corneal astigmatism surgical induced astigmatism arithmetic mean centroid glaucoma trabeculectomy |
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Effect of Trabeculectomy on Mean and Centroid Surgically Induced Astigmatism |
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This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. |
abstractGer |
This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. |
abstract_unstemmed |
This study aimed to investigate the arithmetic mean of surgically induced astigmatism (M-SIA) and the centroid of surgically induced astigmatism (C-SIA) after standard trabeculectomy. We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy. |
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We comprised 185 eyes of 143 consecutive patients (mean age ± standard deviation, 67.7 ± 11.6 years) who underwent trabeculectomy and completed at least a 3-month routine follow-up. In all cases, the scleral flap was made at the nasal-superior location. Corneal astigmatism was measured with an automated keratometer. We calculated the M-SIA and the C-SIA using vector analysis and applied the astigmatism double angle plot. The magnitude of corneal astigmatism increased significantly, from 1.17 ± 0.92 D preoperatively to 1.77 ± 1.05 D postoperatively (paired <i<t</i<-test, <i<p</i< < 0.001). The M-SIA was 1.12 ± 0.55 D, and the C-SIA was 0.73 D 64° ± 1.02 D in the right eye group, and the M-SIA was 1.08 ± 0.48 D and the C-SIA was 0.60 D @117° ± 1.03 D in the left eye group. The C-SIA showed an astigmatic shift toward the nasal-superior location of the scleral flap creation. Our results revealed that trabeculectomy induced the SIA in the direction of the scleral flap location and that the C-SIA was much lower than the M-SIA in eyes undergoing trabeculectomy.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">corneal astigmatism</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">surgical induced astigmatism</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">arithmetic mean</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">centroid</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">glaucoma</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">trabeculectomy</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Medicine</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">R</subfield></datafield><datafield tag="700" ind1="0" ind2=" 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