Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System
Purpose. To investigate interdevice agreement among corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster), and Scheimpflug imaging (Pentacam) for the measurement of corneal astigmatism. Methods. The analysis included 90 eyes of 90 subjects without ocular d...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Journal of Ophthalmology |
| Online Access: | http://dx.doi.org/10.1155/2020/3012748 |
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| author | Yaqin Zhang Jing Dong Suhua Zhang Bin Sun Xiaoliang Wang Maolong Tang Xiaogang Wang |
| author_facet | Yaqin Zhang Jing Dong Suhua Zhang Bin Sun Xiaoliang Wang Maolong Tang Xiaogang Wang |
| author_sort | Yaqin Zhang |
| collection | DOAJ |
| description | Purpose. To investigate interdevice agreement among corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster), and Scheimpflug imaging (Pentacam) for the measurement of corneal astigmatism. Methods. The analysis included 90 eyes of 90 subjects without ocular disease. The main outcome measures were corneal cylinder power and axis of astigmatism. All corneal astigmatism measurements were converted to two perpendicular components by using vector analysis. Interdevice agreement was assessed using Bland–Altman analysis, paired sample t-test, and one-way analysis of variance. Results. No significant interdevice difference existed in the astigmatism magnitude, cardinal component, and oblique component (all P>0.05). On comparing iTrace wavefront and simulated keratometry (SimK) astigmatism, significant differences were observed in the astigmatism magnitude and oblique component (both P<0.01), but not in the cardinal component (P=0.687). On comparing Pentacam pupil 3 mm and corneal vertex 3 mm axial astigmatism, significant difference was observed in the astigmatism magnitude (P<0.001), but not in the cardinal and oblique components (both P>0.05). Conclusions. The iTrace, IOLMaster, and Pentacam devices could be used interchangeably for corneal astigmatism measurement. However, the measurement difference in iTrace wavefront and SimK astigmatism and Pentacam pupil 3 mm and vertex 3 mm axial astigmatism should be considered in clinic practice. |
| format | Article |
| id | doaj-art-90d4e1709cd24a6e87e75b5468658a12 |
| institution | OA Journals |
| issn | 2090-004X 2090-0058 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj-art-90d4e1709cd24a6e87e75b5468658a122025-08-20T02:10:04ZengWileyJournal of Ophthalmology2090-004X2090-00582020-01-01202010.1155/2020/30127483012748Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging SystemYaqin Zhang0Jing Dong1Suhua Zhang2Bin Sun3Xiaoliang Wang4Maolong Tang5Xiaogang Wang6Shanxi Eye Hospital, Taiyuan, Shanxi, ChinaThe First Hospital of Shanxi Medical University, Taiyuan, Shanxi, ChinaShanxi Eye Hospital, Taiyuan, Shanxi, ChinaShanxi Eye Hospital, Taiyuan, Shanxi, ChinaSchool of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai, ChinaCasey Eye Institute, Oregon Health and Science University, Portland, OR, USAShanxi Eye Hospital, Taiyuan, Shanxi, ChinaPurpose. To investigate interdevice agreement among corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster), and Scheimpflug imaging (Pentacam) for the measurement of corneal astigmatism. Methods. The analysis included 90 eyes of 90 subjects without ocular disease. The main outcome measures were corneal cylinder power and axis of astigmatism. All corneal astigmatism measurements were converted to two perpendicular components by using vector analysis. Interdevice agreement was assessed using Bland–Altman analysis, paired sample t-test, and one-way analysis of variance. Results. No significant interdevice difference existed in the astigmatism magnitude, cardinal component, and oblique component (all P>0.05). On comparing iTrace wavefront and simulated keratometry (SimK) astigmatism, significant differences were observed in the astigmatism magnitude and oblique component (both P<0.01), but not in the cardinal component (P=0.687). On comparing Pentacam pupil 3 mm and corneal vertex 3 mm axial astigmatism, significant difference was observed in the astigmatism magnitude (P<0.001), but not in the cardinal and oblique components (both P>0.05). Conclusions. The iTrace, IOLMaster, and Pentacam devices could be used interchangeably for corneal astigmatism measurement. However, the measurement difference in iTrace wavefront and SimK astigmatism and Pentacam pupil 3 mm and vertex 3 mm axial astigmatism should be considered in clinic practice.http://dx.doi.org/10.1155/2020/3012748 |
| spellingShingle | Yaqin Zhang Jing Dong Suhua Zhang Bin Sun Xiaoliang Wang Maolong Tang Xiaogang Wang Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System Journal of Ophthalmology |
| title | Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System |
| title_full | Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System |
| title_fullStr | Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System |
| title_full_unstemmed | Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System |
| title_short | Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System |
| title_sort | corneal astigmatism measurements comparison among ray tracing aberrometry partial coherence interferometry and scheimpflug imaging system |
| url | http://dx.doi.org/10.1155/2020/3012748 |
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