The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation
Purpose: To investigate the influence of posterior corneal astigmatism on the prediction accuracy of toric multifocal intraocular lens (IOL) calculation. Methods: The keratometric astigmatism measured by Lenstar LS 900 (KCAL), keratometric astigmatism (KCAP) and total corneal astigmatism (TCA) measu...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Advances in Ophthalmology Practice and Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667376222000695 |
| _version_ | 1828046570001530880 |
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| author | Shaochong Bu Yuanfeng Jiang Yichen Gao Xiaomei Bai Xiteng Chen Hong Zhang Fang Tian |
| author_facet | Shaochong Bu Yuanfeng Jiang Yichen Gao Xiaomei Bai Xiteng Chen Hong Zhang Fang Tian |
| author_sort | Shaochong Bu |
| collection | DOAJ |
| description | Purpose: To investigate the influence of posterior corneal astigmatism on the prediction accuracy of toric multifocal intraocular lens (IOL) calculation. Methods: The keratometric astigmatism measured by Lenstar LS 900 (KCAL), keratometric astigmatism (KCAP) and total corneal astigmatism (TCA) measured by Scheimpflug camera (Pentacam HR) were documented and analyzed accordingly. Three deduction models using different parameters were compared. Model 1: KCAL + keratometric corneal surgically induced astigmatism (KCSIA, 0.30 D @ 50°); Model 2: KCAP + KCSIA); Model 3: TCA + total CSIA (TCSIA, 0.23 D @ 50°). The prediction errors of each model as the difference vector between the actual and the intended residual astigmatism were compared. Results: Seventy-six eyes implanted with toric multifocal IOLs were included in this study. The vector differences of the actual KCSIA and TCSIA were statistically significant in the total sample and against-the-rule (ATR) subgroup (both P < 0.05). Model 1 deduced the smallest mean values of prediction error, while that of Model 3 were smaller than that of Model 2, both in the total sample and the ATR subgroups (all P < 0.05). Meanwhile, in the total sample and ATR subgroups, the centroid vector magnitudes of Model 3 were smaller than that of Model 1 (0.31 ± 0.76 D and 0.39 ± 0.76 D). Conclusions: The calculation of toric multifocal IOL should be individualized especially in the ATR eyes for the impact of PCA on the estimation of the preoperative corneal astigmatism and the CSIA. |
| first_indexed | 2024-04-10T18:27:42Z |
| format | Article |
| id | doaj.art-60a854d4787949aeb4c72b3668a8dc19 |
| institution | Directory Open Access Journal |
| issn | 2667-3762 |
| language | English |
| last_indexed | 2024-04-10T18:27:42Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Advances in Ophthalmology Practice and Research |
| spelling | doaj.art-60a854d4787949aeb4c72b3668a8dc192023-02-02T04:51:16ZengElsevierAdvances in Ophthalmology Practice and Research2667-37622023-02-01313946The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantationShaochong Bu0Yuanfeng Jiang1Yichen Gao2Xiaomei Bai3Xiteng Chen4Hong Zhang5Fang Tian6Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, 300384, Tianjin, ChinaTianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, 300384, Tianjin, ChinaTianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, 300384, Tianjin, ChinaTianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, 300384, Tianjin, ChinaTianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, 300384, Tianjin, ChinaCorresponding author.; Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, 300384, Tianjin, ChinaCorresponding author.; Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, 300384, Tianjin, ChinaPurpose: To investigate the influence of posterior corneal astigmatism on the prediction accuracy of toric multifocal intraocular lens (IOL) calculation. Methods: The keratometric astigmatism measured by Lenstar LS 900 (KCAL), keratometric astigmatism (KCAP) and total corneal astigmatism (TCA) measured by Scheimpflug camera (Pentacam HR) were documented and analyzed accordingly. Three deduction models using different parameters were compared. Model 1: KCAL + keratometric corneal surgically induced astigmatism (KCSIA, 0.30 D @ 50°); Model 2: KCAP + KCSIA); Model 3: TCA + total CSIA (TCSIA, 0.23 D @ 50°). The prediction errors of each model as the difference vector between the actual and the intended residual astigmatism were compared. Results: Seventy-six eyes implanted with toric multifocal IOLs were included in this study. The vector differences of the actual KCSIA and TCSIA were statistically significant in the total sample and against-the-rule (ATR) subgroup (both P < 0.05). Model 1 deduced the smallest mean values of prediction error, while that of Model 3 were smaller than that of Model 2, both in the total sample and the ATR subgroups (all P < 0.05). Meanwhile, in the total sample and ATR subgroups, the centroid vector magnitudes of Model 3 were smaller than that of Model 1 (0.31 ± 0.76 D and 0.39 ± 0.76 D). Conclusions: The calculation of toric multifocal IOL should be individualized especially in the ATR eyes for the impact of PCA on the estimation of the preoperative corneal astigmatism and the CSIA.http://www.sciencedirect.com/science/article/pii/S2667376222000695Posterior corneal astigmatismToric multifocal intraocular lensCorneal surgically induced astigmatism |
| spellingShingle | Shaochong Bu Yuanfeng Jiang Yichen Gao Xiaomei Bai Xiteng Chen Hong Zhang Fang Tian The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation Advances in Ophthalmology Practice and Research Posterior corneal astigmatism Toric multifocal intraocular lens Corneal surgically induced astigmatism |
| title | The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation |
| title_full | The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation |
| title_fullStr | The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation |
| title_full_unstemmed | The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation |
| title_short | The impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation |
| title_sort | impact of posterior corneal astigmatism on the surgical planning of toric multifocal intraocular lens implantation |
| topic | Posterior corneal astigmatism Toric multifocal intraocular lens Corneal surgically induced astigmatism |
| url | http://www.sciencedirect.com/science/article/pii/S2667376222000695 |
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