Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators
Seth M Pantanelli,1 Ashley Sun,1 Neal Kansara,2 Gerard Smits3 1Department of Ophthalmology, Penn State College of Medicine, Hershey, PA, USA; 2Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA; 3Computer and Statistical Consultants Incorporated, Santa Barbara, CA, USACorrespo...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2022-01-01
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| Series: | Clinical Ophthalmology |
| Subjects: | |
| Online Access: | https://www.dovepress.com/comparison-of-barrett-and-emmetropia-verifying-optical-toric-calculato-peer-reviewed-fulltext-article-OPTH |
| _version_ | 1798025052728328192 |
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| author | Pantanelli SM Sun A Kansara N Smits G |
| author_facet | Pantanelli SM Sun A Kansara N Smits G |
| author_sort | Pantanelli SM |
| collection | DOAJ |
| description | Seth M Pantanelli,1 Ashley Sun,1 Neal Kansara,2 Gerard Smits3 1Department of Ophthalmology, Penn State College of Medicine, Hershey, PA, USA; 2Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA; 3Computer and Statistical Consultants Incorporated, Santa Barbara, CA, USACorrespondence: Seth M PantanelliDepartment of Ophthalmology, Penn State College of Medicine, 500 University Drive, HU19, Hershey, PA, 17033-0850, USA, Tel +1 717-531-5690, Fax +1 717-531-5009, Email spantanelli@pennstatehealth.psu.eduPurpose: The purpose of this study was to compare the Barrett (BTC) and Emmetropia Verifying Optical (EVO) Toric Calculators’ performance with regards to prediction of residual post-operative astigmatism after cataract surgery.Methods: This was a secondary analysis of de-identified data that was collected as part of a prospective multicenter clinical trial in which 109 eyes from 109 patients were implanted with a monofocal toric intraocular lens (IOL). Post-operative biometry was used to calculate the predicted post-operative residual astigmatism for each eye using the two different calculators. The vector difference between the actual and predicted residual astigmatism was calculated.Results: The mean absolute astigmatism prediction errors were 0.59 ± 0.38 D and 0.59 ± 0.36 D for the BTC and EVO calculators, respectively (p = 0.98). The centroid of the prediction errors were 0.18 D @ 89° ± 0.68 D and 0.20 D @ 89° ± 0.66 D, respectively (p = 0.21). The proportion of eyes in which the astigmatism prediction error was ≤ 0.5 D was 50% for BTC and 46% for EVO (p = 0.28). The proportion of eyes in which the post-operative astigmatism orientation was correctly predicted as being against-the-rule, with-the-rule, or oblique was 81% for BTC and 77% for EVO (p = 0.15).Conclusion: The Barrett and Emmetropia Verifying Optical Toric Calculators had similar performance with regards to their astigmatism prediction accuracy.Keywords: Barrett, EVO, astigmatism, toric, cataract, residual astigmatism |
| first_indexed | 2024-04-11T18:12:35Z |
| format | Article |
| id | doaj.art-fb2d4b45e4fb43bea7514a5b2a3600cf |
| institution | Directory Open Access Journal |
| issn | 1177-5483 |
| language | English |
| last_indexed | 2024-04-11T18:12:35Z |
| publishDate | 2022-01-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | Clinical Ophthalmology |
| spelling | doaj.art-fb2d4b45e4fb43bea7514a5b2a3600cf2022-12-22T04:10:04ZengDove Medical PressClinical Ophthalmology1177-54832022-01-01Volume 1617718272480Comparison of Barrett and Emmetropia Verifying Optical Toric CalculatorsPantanelli SMSun AKansara NSmits GSeth M Pantanelli,1 Ashley Sun,1 Neal Kansara,2 Gerard Smits3 1Department of Ophthalmology, Penn State College of Medicine, Hershey, PA, USA; 2Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA; 3Computer and Statistical Consultants Incorporated, Santa Barbara, CA, USACorrespondence: Seth M PantanelliDepartment of Ophthalmology, Penn State College of Medicine, 500 University Drive, HU19, Hershey, PA, 17033-0850, USA, Tel +1 717-531-5690, Fax +1 717-531-5009, Email spantanelli@pennstatehealth.psu.eduPurpose: The purpose of this study was to compare the Barrett (BTC) and Emmetropia Verifying Optical (EVO) Toric Calculators’ performance with regards to prediction of residual post-operative astigmatism after cataract surgery.Methods: This was a secondary analysis of de-identified data that was collected as part of a prospective multicenter clinical trial in which 109 eyes from 109 patients were implanted with a monofocal toric intraocular lens (IOL). Post-operative biometry was used to calculate the predicted post-operative residual astigmatism for each eye using the two different calculators. The vector difference between the actual and predicted residual astigmatism was calculated.Results: The mean absolute astigmatism prediction errors were 0.59 ± 0.38 D and 0.59 ± 0.36 D for the BTC and EVO calculators, respectively (p = 0.98). The centroid of the prediction errors were 0.18 D @ 89° ± 0.68 D and 0.20 D @ 89° ± 0.66 D, respectively (p = 0.21). The proportion of eyes in which the astigmatism prediction error was ≤ 0.5 D was 50% for BTC and 46% for EVO (p = 0.28). The proportion of eyes in which the post-operative astigmatism orientation was correctly predicted as being against-the-rule, with-the-rule, or oblique was 81% for BTC and 77% for EVO (p = 0.15).Conclusion: The Barrett and Emmetropia Verifying Optical Toric Calculators had similar performance with regards to their astigmatism prediction accuracy.Keywords: Barrett, EVO, astigmatism, toric, cataract, residual astigmatismhttps://www.dovepress.com/comparison-of-barrett-and-emmetropia-verifying-optical-toric-calculato-peer-reviewed-fulltext-article-OPTHbarrettevoastigmatismtoriccataractresidual astigmatism |
| spellingShingle | Pantanelli SM Sun A Kansara N Smits G Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators Clinical Ophthalmology barrett evo astigmatism toric cataract residual astigmatism |
| title | Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators |
| title_full | Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators |
| title_fullStr | Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators |
| title_full_unstemmed | Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators |
| title_short | Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators |
| title_sort | comparison of barrett and emmetropia verifying optical toric calculators |
| topic | barrett evo astigmatism toric cataract residual astigmatism |
| url | https://www.dovepress.com/comparison-of-barrett-and-emmetropia-verifying-optical-toric-calculato-peer-reviewed-fulltext-article-OPTH |
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