The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery
Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the c...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Liu W [verfasserIn] Yang L [verfasserIn] Liu J [verfasserIn] |
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E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
surgically induced astigmatism |
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| Übergeordnetes Werk: |
In: International Journal of General Medicine - Dove Medical Press, 2008, (2022), Seite 8417-8425 |
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year:2022 ; pages:8417-8425 |
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DOAJ086021508 |
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| 520 | |a Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA | ||
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(DE-627)DOAJ086021508 (DE-599)DOAJ6f965c0e2973444c8b9b8fb7071bafa7 DE-627 ger DE-627 rakwb eng R5-920 Liu W verfasserin aut The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA surgically induced astigmatism sia posterior corneal astigmatism pa keratometric astigmatism ka total corneal astigmatism ta Medicine (General) Yang L verfasserin aut Liu J verfasserin aut In International Journal of General Medicine Dove Medical Press, 2008 (2022), Seite 8417-8425 (DE-627)578539691 (DE-600)2452220-X 11787074 nnns year:2022 pages:8417-8425 https://doaj.org/article/6f965c0e2973444c8b9b8fb7071bafa7 kostenfrei https://www.dovepress.com/the-impact-of-posterior-corneal-astigmatism-on-surgically-induced-asti-peer-reviewed-fulltext-article-IJGM kostenfrei https://doaj.org/toc/1178-7074 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_2003 GBV_ILN_2014 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 2022 8417-8425 |
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(DE-627)DOAJ086021508 (DE-599)DOAJ6f965c0e2973444c8b9b8fb7071bafa7 DE-627 ger DE-627 rakwb eng R5-920 Liu W verfasserin aut The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA surgically induced astigmatism sia posterior corneal astigmatism pa keratometric astigmatism ka total corneal astigmatism ta Medicine (General) Yang L verfasserin aut Liu J verfasserin aut In International Journal of General Medicine Dove Medical Press, 2008 (2022), Seite 8417-8425 (DE-627)578539691 (DE-600)2452220-X 11787074 nnns year:2022 pages:8417-8425 https://doaj.org/article/6f965c0e2973444c8b9b8fb7071bafa7 kostenfrei https://www.dovepress.com/the-impact-of-posterior-corneal-astigmatism-on-surgically-induced-asti-peer-reviewed-fulltext-article-IJGM kostenfrei https://doaj.org/toc/1178-7074 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_2003 GBV_ILN_2014 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 2022 8417-8425 |
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(DE-627)DOAJ086021508 (DE-599)DOAJ6f965c0e2973444c8b9b8fb7071bafa7 DE-627 ger DE-627 rakwb eng R5-920 Liu W verfasserin aut The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA surgically induced astigmatism sia posterior corneal astigmatism pa keratometric astigmatism ka total corneal astigmatism ta Medicine (General) Yang L verfasserin aut Liu J verfasserin aut In International Journal of General Medicine Dove Medical Press, 2008 (2022), Seite 8417-8425 (DE-627)578539691 (DE-600)2452220-X 11787074 nnns year:2022 pages:8417-8425 https://doaj.org/article/6f965c0e2973444c8b9b8fb7071bafa7 kostenfrei https://www.dovepress.com/the-impact-of-posterior-corneal-astigmatism-on-surgically-induced-asti-peer-reviewed-fulltext-article-IJGM kostenfrei https://doaj.org/toc/1178-7074 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_2003 GBV_ILN_2014 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 2022 8417-8425 |
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(DE-627)DOAJ086021508 (DE-599)DOAJ6f965c0e2973444c8b9b8fb7071bafa7 DE-627 ger DE-627 rakwb eng R5-920 Liu W verfasserin aut The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA surgically induced astigmatism sia posterior corneal astigmatism pa keratometric astigmatism ka total corneal astigmatism ta Medicine (General) Yang L verfasserin aut Liu J verfasserin aut In International Journal of General Medicine Dove Medical Press, 2008 (2022), Seite 8417-8425 (DE-627)578539691 (DE-600)2452220-X 11787074 nnns year:2022 pages:8417-8425 https://doaj.org/article/6f965c0e2973444c8b9b8fb7071bafa7 kostenfrei https://www.dovepress.com/the-impact-of-posterior-corneal-astigmatism-on-surgically-induced-asti-peer-reviewed-fulltext-article-IJGM kostenfrei https://doaj.org/toc/1178-7074 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_2003 GBV_ILN_2014 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 2022 8417-8425 |
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(DE-627)DOAJ086021508 (DE-599)DOAJ6f965c0e2973444c8b9b8fb7071bafa7 DE-627 ger DE-627 rakwb eng R5-920 Liu W verfasserin aut The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA surgically induced astigmatism sia posterior corneal astigmatism pa keratometric astigmatism ka total corneal astigmatism ta Medicine (General) Yang L verfasserin aut Liu J verfasserin aut In International Journal of General Medicine Dove Medical Press, 2008 (2022), Seite 8417-8425 (DE-627)578539691 (DE-600)2452220-X 11787074 nnns year:2022 pages:8417-8425 https://doaj.org/article/6f965c0e2973444c8b9b8fb7071bafa7 kostenfrei https://www.dovepress.com/the-impact-of-posterior-corneal-astigmatism-on-surgically-induced-asti-peer-reviewed-fulltext-article-IJGM kostenfrei https://doaj.org/toc/1178-7074 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_2003 GBV_ILN_2014 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 2022 8417-8425 |
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The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery |
| abstract |
Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA |
| abstractGer |
Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA |
| abstract_unstemmed |
Wenjie Liu,* Lichun Yang,* Jiewei Liu Cataract Department, Shanxi Eye Hospital, Taiyuan, Shanxi Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jiewei Liu, Email jieweiliu1967163.comPurpose: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.Patients and Methods: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.Results: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the “with-the-rule (WTR) astigmatism” group and “overall patient” group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the “against-the-rule (ATR) astigmatism” group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤ 0.4 D or KA ≤ 2.0 D, SIAPA can be ignored. However, when PA < 0.4 D or KA < 2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.Conclusion: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.Keywords: surgically induced astigmatism, SIA, posterior corneal astigmatism, PA, keratometric astigmatism, KA, total corneal astigmatism, TA |
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| title_short |
The Impact of Posterior Corneal Astigmatism on Surgically Induced Astigmatism in Cataract Surgery |
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https://doaj.org/article/6f965c0e2973444c8b9b8fb7071bafa7 https://www.dovepress.com/the-impact-of-posterior-corneal-astigmatism-on-surgically-induced-asti-peer-reviewed-fulltext-article-IJGM https://doaj.org/toc/1178-7074 |
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