Cylinder Axis Agreement: Unexpected Scenarios
Karim Mahmoud Nabil Department of Ophthalmology, Faculty of Medicine, University of Alexandria, Alexandria, EgyptCorrespondence: Karim Mahmoud NabilDepartment of Ophthalmology, Faculty of Medicine, University of Alexandria, Alexandria, EgyptEmail Karim_nabil_ophth@yahoo.comBackground: The purpose of...
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2020-03-01
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| Series: | Clinical Ophthalmology |
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| Online Access: | https://www.dovepress.com/cylinder-axis-agreement-unexpected-scenarios-peer-reviewed-article-OPTH |
| _version_ | 1818684244999798784 |
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| author | Nabil KM |
| author_facet | Nabil KM |
| author_sort | Nabil KM |
| collection | DOAJ |
| description | Karim Mahmoud Nabil Department of Ophthalmology, Faculty of Medicine, University of Alexandria, Alexandria, EgyptCorrespondence: Karim Mahmoud NabilDepartment of Ophthalmology, Faculty of Medicine, University of Alexandria, Alexandria, EgyptEmail Karim_nabil_ophth@yahoo.comBackground: The purpose of this retrospective study was to evaluate cylinder axis agreement between manifest refraction (MR), cycloplegic refraction (CR), Allegro Oculyzer ІІ and Allegro Topolyzer-Vario.Methods: We included 82 patients (32 males and 50 females, 28.1 ± 8.7 years old), with 156 eyes scheduled for wavefront optimized laser refractive surgery, photorefractive keratectomy (PRK) in 50 eyes and laser-assisted in situ keratomileusis (LASIK) in 106 eyes, for correction of simple, myopic, hyperopic or mixed astigmatism. Cylinder axis was determined under manifest and cycloplegic refractions and using Allegro Occulyzer ІІ and Allegro Topolyzer-Vario platforms. Cylinder axis agreement was assessed by intraclass correlation coefficient, Pearson correlation coefficient and by the method described by Bland and Altman.Results: Intraclass correlation coefficient and Pearson correlation coefficient showed statistically significant cylinder axis agreement between manifest refraction, cycloplegic refraction, Allegro Oculyzer ІІ and Allegro Topolyzer-Vario (p < 0.001). Despite statistically significant cylinder axis agreement between the four measuring tools, 4 of 156 eyes (2.5%) showed unexpected discrepancy between Allegro Oculyzer ІІ and Allegro Topolyzer-Vario cylinder axis.Conclusion: Although cylinder axis shows statistically significant agreement between manifest refraction, cycloplegic refraction, Allegro Oculyzer ІІ and Allegro Topolyzer-Vario, unexpected discrepancies occur.Keywords: manifest refraction, cycloplegic refraction, Allegro Oculyzer ІІ, Allegro Topolyzer-Vario, PRK, LASIK |
| first_indexed | 2024-12-17T10:47:34Z |
| format | Article |
| id | doaj.art-eb431fd94153497ba2aa603c65618475 |
| institution | Directory Open Access Journal |
| issn | 1177-5483 |
| language | English |
| last_indexed | 2024-12-17T10:47:34Z |
| publishDate | 2020-03-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | Clinical Ophthalmology |
| spelling | doaj.art-eb431fd94153497ba2aa603c656184752022-12-21T21:52:04ZengDove Medical PressClinical Ophthalmology1177-54832020-03-01Volume 1497798452830Cylinder Axis Agreement: Unexpected ScenariosNabil KMKarim Mahmoud Nabil Department of Ophthalmology, Faculty of Medicine, University of Alexandria, Alexandria, EgyptCorrespondence: Karim Mahmoud NabilDepartment of Ophthalmology, Faculty of Medicine, University of Alexandria, Alexandria, EgyptEmail Karim_nabil_ophth@yahoo.comBackground: The purpose of this retrospective study was to evaluate cylinder axis agreement between manifest refraction (MR), cycloplegic refraction (CR), Allegro Oculyzer ІІ and Allegro Topolyzer-Vario.Methods: We included 82 patients (32 males and 50 females, 28.1 ± 8.7 years old), with 156 eyes scheduled for wavefront optimized laser refractive surgery, photorefractive keratectomy (PRK) in 50 eyes and laser-assisted in situ keratomileusis (LASIK) in 106 eyes, for correction of simple, myopic, hyperopic or mixed astigmatism. Cylinder axis was determined under manifest and cycloplegic refractions and using Allegro Occulyzer ІІ and Allegro Topolyzer-Vario platforms. Cylinder axis agreement was assessed by intraclass correlation coefficient, Pearson correlation coefficient and by the method described by Bland and Altman.Results: Intraclass correlation coefficient and Pearson correlation coefficient showed statistically significant cylinder axis agreement between manifest refraction, cycloplegic refraction, Allegro Oculyzer ІІ and Allegro Topolyzer-Vario (p < 0.001). Despite statistically significant cylinder axis agreement between the four measuring tools, 4 of 156 eyes (2.5%) showed unexpected discrepancy between Allegro Oculyzer ІІ and Allegro Topolyzer-Vario cylinder axis.Conclusion: Although cylinder axis shows statistically significant agreement between manifest refraction, cycloplegic refraction, Allegro Oculyzer ІІ and Allegro Topolyzer-Vario, unexpected discrepancies occur.Keywords: manifest refraction, cycloplegic refraction, Allegro Oculyzer ІІ, Allegro Topolyzer-Vario, PRK, LASIKhttps://www.dovepress.com/cylinder-axis-agreement-unexpected-scenarios-peer-reviewed-article-OPTHmanifest refractioncycloplegic refractionallegro oculyzer ііallegro topolyzer-varioprklasik. |
| spellingShingle | Nabil KM Cylinder Axis Agreement: Unexpected Scenarios Clinical Ophthalmology manifest refraction cycloplegic refraction allegro oculyzer іі allegro topolyzer-vario prk lasik. |
| title | Cylinder Axis Agreement: Unexpected Scenarios |
| title_full | Cylinder Axis Agreement: Unexpected Scenarios |
| title_fullStr | Cylinder Axis Agreement: Unexpected Scenarios |
| title_full_unstemmed | Cylinder Axis Agreement: Unexpected Scenarios |
| title_short | Cylinder Axis Agreement: Unexpected Scenarios |
| title_sort | cylinder axis agreement unexpected scenarios |
| topic | manifest refraction cycloplegic refraction allegro oculyzer іі allegro topolyzer-vario prk lasik. |
| url | https://www.dovepress.com/cylinder-axis-agreement-unexpected-scenarios-peer-reviewed-article-OPTH |
| work_keys_str_mv | AT nabilkm cylinderaxisagreementunexpectedscenarios |