Intraocular lens power calculation in patients with irregular astigmatism
Purpose Accurate intraocular lens (IOL) calculation in subjects with irregular astigmatism is challenging. This study evaluated the accuracy of using Scheimpflug-derived central 2-mm equivalent keratometry reading (EKR) values for IOL calculation in irregular astigmatism. Methods This retrospective...
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| Veröffentlicht in: | Graefe's archive for clinical and experimental ophthalmology 2022-12, Vol.260 (12), p.3889-3895 |
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| creator | Achiron, Asaf Elhaddad, Omar Leadbetter, Duncan Levinger, Eliya Voytsekhivskyy, Oleksiy Smith, Katy Avadhanam, Venkata Darcy, Kieren Tole, Derek |
| description | Purpose
Accurate intraocular lens (IOL) calculation in subjects with irregular astigmatism is challenging. This study evaluated the accuracy of using Scheimpflug-derived central 2-mm equivalent keratometry reading (EKR) values for IOL calculation in irregular astigmatism.
Methods
This retrospective study included subjects (31 eyes of 30 patients) who underwent cataract surgery and IOL calculation using the 2-mm central EKR methods. We compared prediction error (PE) and absolute PE (APE) outcomes using SRK/T and Barrett Universal II formulas for keratometry data obtained from the IOLMaster 500 and Pentacam (anterior corneal sim
k
) devices.
Results
Cataract surgery and IOL calculation using the 2-mm central EKR methods resulted in improved visual acuity (uncorrected: from 1.13 ± 0.38 to 0.65 ± 0.46 logMar,
p
|
| doi_str_mv | 10.1007/s00417-022-05729-z |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_2684097168</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2736486017</sourcerecordid><originalsourceid>FETCH-LOGICAL-c282t-54bddd84f17d1657f63d32a70e89014df70b40eeab14078d0fefbf37948e165e3</originalsourceid><addsrcrecordid>eNp9kE1LxDAQhoMouK7-AU8FL16ik4826VEWPxYWvCjsLaRtsnZp05q0LO6vN7sVBA-eZph5nmF4EbomcEcAxH0A4ERgoBRDKmiO9ydoRjhLsQC6PkUzEJRgyej6HF2EsIXIs5TM0HLpBq-7cmy0TxrjQtJ3O-OTUjeH2VB3Lqld0sfOuCEku3r4SGrvzeZo6DDUmzYuQ3uJzqxugrn6qXP0_vT4tnjBq9fn5eJhhUsq6YBTXlRVJbkloiJZKmzGKka1ACNzILyyAgoOxuiCcBCyAmtsYZnIuTSRN2yObqe7ve8-RxMG1dahNE2jnenGoGgmOeSCZDKiN3_QbTd6F79TVLCMywyIiBSdqNJ3IXhjVe_rVvsvRUAd0lVTuiqmq47pqn2U2CSFCLuN8b-n_7G-AeXffkc</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2736486017</pqid></control><display><type>article</type><title>Intraocular lens power calculation in patients with irregular astigmatism</title><source>SpringerLink Journals - AutoHoldings</source><creator>Achiron, Asaf ; Elhaddad, Omar ; Leadbetter, Duncan ; Levinger, Eliya ; Voytsekhivskyy, Oleksiy ; Smith, Katy ; Avadhanam, Venkata ; Darcy, Kieren ; Tole, Derek</creator><creatorcontrib>Achiron, Asaf ; Elhaddad, Omar ; Leadbetter, Duncan ; Levinger, Eliya ; Voytsekhivskyy, Oleksiy ; Smith, Katy ; Avadhanam, Venkata ; Darcy, Kieren ; Tole, Derek</creatorcontrib><description>Purpose
Accurate intraocular lens (IOL) calculation in subjects with irregular astigmatism is challenging. This study evaluated the accuracy of using Scheimpflug-derived central 2-mm equivalent keratometry reading (EKR) values for IOL calculation in irregular astigmatism.
Methods
This retrospective study included subjects (31 eyes of 30 patients) who underwent cataract surgery and IOL calculation using the 2-mm central EKR methods. We compared prediction error (PE) and absolute PE (APE) outcomes using SRK/T and Barrett Universal II formulas for keratometry data obtained from the IOLMaster 500 and Pentacam (anterior corneal sim
k
) devices.
Results
Cataract surgery and IOL calculation using the 2-mm central EKR methods resulted in improved visual acuity (uncorrected: from 1.13 ± 0.38 to 0.65 ± 0.46 logMar,
p
< 0.01; best-corrected: from 0.45 ± 0.24 to 0.26 ± 0.20 logMar,
p
< 0.01) after surgery. The percentage of subjects with best-corrected visual acuity of 6/6 was 22%, < 6/9 was 58%, and < 6/12 was 71%. For both the SRK/T and the Barrett formulas, the PE was similar to those obtained by IOLMaster (> 0.14) but lower than those obtained by the anterior corneal sim
k
(
p
< 0.02). IOLMaster provided keratometry reading in only 23/31 (74.1%) of cases.
Conclusions
The use of Scheimpflug central 2-mm EKR for IOL calculation in irregular astigmatism was beneficial in terms of visual acuity improvement. It had comparable refractive prediction performance to the IOLMaster 500 and better than the anterior corneal sim
K
. The 2-mm EKR method can be used when IOLMaster cannot provide a reliable reading in abnormal corneas.</description><identifier>ISSN: 0721-832X</identifier><identifier>EISSN: 1435-702X</identifier><identifier>DOI: 10.1007/s00417-022-05729-z</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Acuity ; Astigmatism ; Cataract ; Cataracts ; Cornea ; Eye surgery ; Medicine ; Medicine & Public Health ; Ophthalmology ; Patients ; Surgery</subject><ispartof>Graefe's archive for clinical and experimental ophthalmology, 2022-12, Vol.260 (12), p.3889-3895</ispartof><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022</rights><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c282t-54bddd84f17d1657f63d32a70e89014df70b40eeab14078d0fefbf37948e165e3</citedby><cites>FETCH-LOGICAL-c282t-54bddd84f17d1657f63d32a70e89014df70b40eeab14078d0fefbf37948e165e3</cites><orcidid>0000-0001-6315-6908</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00417-022-05729-z$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00417-022-05729-z$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Achiron, Asaf</creatorcontrib><creatorcontrib>Elhaddad, Omar</creatorcontrib><creatorcontrib>Leadbetter, Duncan</creatorcontrib><creatorcontrib>Levinger, Eliya</creatorcontrib><creatorcontrib>Voytsekhivskyy, Oleksiy</creatorcontrib><creatorcontrib>Smith, Katy</creatorcontrib><creatorcontrib>Avadhanam, Venkata</creatorcontrib><creatorcontrib>Darcy, Kieren</creatorcontrib><creatorcontrib>Tole, Derek</creatorcontrib><title>Intraocular lens power calculation in patients with irregular astigmatism</title><title>Graefe's archive for clinical and experimental ophthalmology</title><addtitle>Graefes Arch Clin Exp Ophthalmol</addtitle><description>Purpose
Accurate intraocular lens (IOL) calculation in subjects with irregular astigmatism is challenging. This study evaluated the accuracy of using Scheimpflug-derived central 2-mm equivalent keratometry reading (EKR) values for IOL calculation in irregular astigmatism.
Methods
This retrospective study included subjects (31 eyes of 30 patients) who underwent cataract surgery and IOL calculation using the 2-mm central EKR methods. We compared prediction error (PE) and absolute PE (APE) outcomes using SRK/T and Barrett Universal II formulas for keratometry data obtained from the IOLMaster 500 and Pentacam (anterior corneal sim
k
) devices.
Results
Cataract surgery and IOL calculation using the 2-mm central EKR methods resulted in improved visual acuity (uncorrected: from 1.13 ± 0.38 to 0.65 ± 0.46 logMar,
p
< 0.01; best-corrected: from 0.45 ± 0.24 to 0.26 ± 0.20 logMar,
p
< 0.01) after surgery. The percentage of subjects with best-corrected visual acuity of 6/6 was 22%, < 6/9 was 58%, and < 6/12 was 71%. For both the SRK/T and the Barrett formulas, the PE was similar to those obtained by IOLMaster (> 0.14) but lower than those obtained by the anterior corneal sim
k
(
p
< 0.02). IOLMaster provided keratometry reading in only 23/31 (74.1%) of cases.
Conclusions
The use of Scheimpflug central 2-mm EKR for IOL calculation in irregular astigmatism was beneficial in terms of visual acuity improvement. It had comparable refractive prediction performance to the IOLMaster 500 and better than the anterior corneal sim
K
. The 2-mm EKR method can be used when IOLMaster cannot provide a reliable reading in abnormal corneas.</description><subject>Acuity</subject><subject>Astigmatism</subject><subject>Cataract</subject><subject>Cataracts</subject><subject>Cornea</subject><subject>Eye surgery</subject><subject>Medicine</subject><subject>Medicine & Public Health</subject><subject>Ophthalmology</subject><subject>Patients</subject><subject>Surgery</subject><issn>0721-832X</issn><issn>1435-702X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><recordid>eNp9kE1LxDAQhoMouK7-AU8FL16ik4826VEWPxYWvCjsLaRtsnZp05q0LO6vN7sVBA-eZph5nmF4EbomcEcAxH0A4ERgoBRDKmiO9ydoRjhLsQC6PkUzEJRgyej6HF2EsIXIs5TM0HLpBq-7cmy0TxrjQtJ3O-OTUjeH2VB3Lqld0sfOuCEku3r4SGrvzeZo6DDUmzYuQ3uJzqxugrn6qXP0_vT4tnjBq9fn5eJhhUsq6YBTXlRVJbkloiJZKmzGKka1ACNzILyyAgoOxuiCcBCyAmtsYZnIuTSRN2yObqe7ve8-RxMG1dahNE2jnenGoGgmOeSCZDKiN3_QbTd6F79TVLCMywyIiBSdqNJ3IXhjVe_rVvsvRUAd0lVTuiqmq47pqn2U2CSFCLuN8b-n_7G-AeXffkc</recordid><startdate>20221201</startdate><enddate>20221201</enddate><creator>Achiron, Asaf</creator><creator>Elhaddad, Omar</creator><creator>Leadbetter, Duncan</creator><creator>Levinger, Eliya</creator><creator>Voytsekhivskyy, Oleksiy</creator><creator>Smith, Katy</creator><creator>Avadhanam, Venkata</creator><creator>Darcy, Kieren</creator><creator>Tole, Derek</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TK</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>K9.</scope><scope>M0S</scope><scope>M1P</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0001-6315-6908</orcidid></search><sort><creationdate>20221201</creationdate><title>Intraocular lens power calculation in patients with irregular astigmatism</title><author>Achiron, Asaf ; Elhaddad, Omar ; Leadbetter, Duncan ; Levinger, Eliya ; Voytsekhivskyy, Oleksiy ; Smith, Katy ; Avadhanam, Venkata ; Darcy, Kieren ; Tole, Derek</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c282t-54bddd84f17d1657f63d32a70e89014df70b40eeab14078d0fefbf37948e165e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Acuity</topic><topic>Astigmatism</topic><topic>Cataract</topic><topic>Cataracts</topic><topic>Cornea</topic><topic>Eye surgery</topic><topic>Medicine</topic><topic>Medicine & Public Health</topic><topic>Ophthalmology</topic><topic>Patients</topic><topic>Surgery</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Achiron, Asaf</creatorcontrib><creatorcontrib>Elhaddad, Omar</creatorcontrib><creatorcontrib>Leadbetter, Duncan</creatorcontrib><creatorcontrib>Levinger, Eliya</creatorcontrib><creatorcontrib>Voytsekhivskyy, Oleksiy</creatorcontrib><creatorcontrib>Smith, Katy</creatorcontrib><creatorcontrib>Avadhanam, Venkata</creatorcontrib><creatorcontrib>Darcy, Kieren</creatorcontrib><creatorcontrib>Tole, Derek</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Neurosciences Abstracts</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>MEDLINE - Academic</collection><jtitle>Graefe's archive for clinical and experimental ophthalmology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Achiron, Asaf</au><au>Elhaddad, Omar</au><au>Leadbetter, Duncan</au><au>Levinger, Eliya</au><au>Voytsekhivskyy, Oleksiy</au><au>Smith, Katy</au><au>Avadhanam, Venkata</au><au>Darcy, Kieren</au><au>Tole, Derek</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Intraocular lens power calculation in patients with irregular astigmatism</atitle><jtitle>Graefe's archive for clinical and experimental ophthalmology</jtitle><stitle>Graefes Arch Clin Exp Ophthalmol</stitle><date>2022-12-01</date><risdate>2022</risdate><volume>260</volume><issue>12</issue><spage>3889</spage><epage>3895</epage><pages>3889-3895</pages><issn>0721-832X</issn><eissn>1435-702X</eissn><abstract>Purpose
Accurate intraocular lens (IOL) calculation in subjects with irregular astigmatism is challenging. This study evaluated the accuracy of using Scheimpflug-derived central 2-mm equivalent keratometry reading (EKR) values for IOL calculation in irregular astigmatism.
Methods
This retrospective study included subjects (31 eyes of 30 patients) who underwent cataract surgery and IOL calculation using the 2-mm central EKR methods. We compared prediction error (PE) and absolute PE (APE) outcomes using SRK/T and Barrett Universal II formulas for keratometry data obtained from the IOLMaster 500 and Pentacam (anterior corneal sim
k
) devices.
Results
Cataract surgery and IOL calculation using the 2-mm central EKR methods resulted in improved visual acuity (uncorrected: from 1.13 ± 0.38 to 0.65 ± 0.46 logMar,
p
< 0.01; best-corrected: from 0.45 ± 0.24 to 0.26 ± 0.20 logMar,
p
< 0.01) after surgery. The percentage of subjects with best-corrected visual acuity of 6/6 was 22%, < 6/9 was 58%, and < 6/12 was 71%. For both the SRK/T and the Barrett formulas, the PE was similar to those obtained by IOLMaster (> 0.14) but lower than those obtained by the anterior corneal sim
k
(
p
< 0.02). IOLMaster provided keratometry reading in only 23/31 (74.1%) of cases.
Conclusions
The use of Scheimpflug central 2-mm EKR for IOL calculation in irregular astigmatism was beneficial in terms of visual acuity improvement. It had comparable refractive prediction performance to the IOLMaster 500 and better than the anterior corneal sim
K
. The 2-mm EKR method can be used when IOLMaster cannot provide a reliable reading in abnormal corneas.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s00417-022-05729-z</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0001-6315-6908</orcidid></addata></record> |
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| ispartof | Graefe's archive for clinical and experimental ophthalmology, 2022-12, Vol.260 (12), p.3889-3895 |
| issn | 0721-832X 1435-702X |
| language | eng |
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| source | SpringerLink Journals - AutoHoldings |
| subjects | Acuity Astigmatism Cataract Cataracts Cornea Eye surgery Medicine Medicine & Public Health Ophthalmology Patients Surgery |
| title | Intraocular lens power calculation in patients with irregular astigmatism |
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