Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysis
AIM: To assess the anterior corneal astigmatism(ACA)and posterior corneal astigmatism(PCA)patterns across various age groups. We also evaluated the association between magnitudes and axes of the ACA and PCA across these age groups. <p>METHODS: The present study was a cross-sectional analysis o...
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| Format: | Article |
| Language: | English |
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Press of International Journal of Ophthalmology (IJO PRESS)
2017-11-01
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| Series: | Guoji Yanke Zazhi |
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| Online Access: | http://ies.ijo.cn/cn_publish/2017/11/201711002.pdf |
| _version_ | 1811203896992858112 |
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| author | Vijay Shetty Suhas S Haldipurkar Rita Dhamankar Tanvi Haldipurkar Onkar Pirdankar Maninder Singh Setia |
| author_facet | Vijay Shetty Suhas S Haldipurkar Rita Dhamankar Tanvi Haldipurkar Onkar Pirdankar Maninder Singh Setia |
| author_sort | Vijay Shetty |
| collection | DOAJ |
| description | AIM: To assess the anterior corneal astigmatism(ACA)and posterior corneal astigmatism(PCA)patterns across various age groups. We also evaluated the association between magnitudes and axes of the ACA and PCA across these age groups. <p>METHODS: The present study was a cross-sectional analysis of clinical data of 381 eyes. We converted the clinical astigmatic notation to vector notation for analysis of ACA and PCA. We estimated the correlation between magnitude and axes of the ACA and PCA in the whole population and in four age groups(5-19, 20-39, 40-59, and ≥ 60y). We used random effects linear regression models for estimating the association between the magnitudes of ACA and PCA.<p>RESULTS: The mean of the magnitude of the ACA(3.59D)and the PCA(0.50D)was highest in children(5 to 9y). Overall, the magnitude of the ACA ranged from 0D to 10.0 Diopters(D)and the magnitude of the PCA ranged from 0 to 3.5 D. There was a significant correlation between the ACA and the PCA in the younger age group(<i>r</i>=0.85, <i>P</i><0.001). In those 60y or older, the PCA increased by 0.04 units(95% confidence intervals: 0.005, 0.07; <i>P</i>=0.03)with each unit increase in the ACA, the increase was the smallest in this age group.<p>CONCLUSION: It will be prudent to measure the both the magnitude and axis of the PCA, particularly in those above 60y rather than rely on rule-of-thumb calculations based on ACA parameters for IOL power calculation. |
| first_indexed | 2024-04-12T03:03:43Z |
| format | Article |
| id | doaj.art-3a318954e7b8439ca4d1a40e3c9ed2d9 |
| institution | Directory Open Access Journal |
| issn | 1672-5123 1672-5123 |
| language | English |
| last_indexed | 2024-04-12T03:03:43Z |
| publishDate | 2017-11-01 |
| publisher | Press of International Journal of Ophthalmology (IJO PRESS) |
| record_format | Article |
| series | Guoji Yanke Zazhi |
| spelling | doaj.art-3a318954e7b8439ca4d1a40e3c9ed2d92022-12-22T03:50:34ZengPress of International Journal of Ophthalmology (IJO PRESS)Guoji Yanke Zazhi1672-51231672-51232017-11-0117111993199910.3980/j.issn.1672-5123.2017.11.02Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysisVijay Shetty0Suhas S Haldipurkar1Rita Dhamankar2Tanvi Haldipurkar3Onkar Pirdankar4Maninder Singh Setia5Department of Ophthalmology, Laxmi Eye Institute, Panvel, Maharashtra 410206, IndiaDepartment of Ophthalmology, Laxmi Eye Institute, Panvel, Maharashtra 410206, IndiaDepartment of Ophthalmology, Laxmi Eye Institute, Panvel, Maharashtra 410206, IndiaDepartment of Ophthalmology, Laxmi Eye Institute, Panvel, Maharashtra 410206, IndiaDepartment of Ophthalmology, Laxmi Eye Institute, Panvel, Maharashtra 410206, IndiaDepartment of Epidemiology, Laxmi Eye Institute, Panvel, Maharashtra 410206, IndiaAIM: To assess the anterior corneal astigmatism(ACA)and posterior corneal astigmatism(PCA)patterns across various age groups. We also evaluated the association between magnitudes and axes of the ACA and PCA across these age groups. <p>METHODS: The present study was a cross-sectional analysis of clinical data of 381 eyes. We converted the clinical astigmatic notation to vector notation for analysis of ACA and PCA. We estimated the correlation between magnitude and axes of the ACA and PCA in the whole population and in four age groups(5-19, 20-39, 40-59, and ≥ 60y). We used random effects linear regression models for estimating the association between the magnitudes of ACA and PCA.<p>RESULTS: The mean of the magnitude of the ACA(3.59D)and the PCA(0.50D)was highest in children(5 to 9y). Overall, the magnitude of the ACA ranged from 0D to 10.0 Diopters(D)and the magnitude of the PCA ranged from 0 to 3.5 D. There was a significant correlation between the ACA and the PCA in the younger age group(<i>r</i>=0.85, <i>P</i><0.001). In those 60y or older, the PCA increased by 0.04 units(95% confidence intervals: 0.005, 0.07; <i>P</i>=0.03)with each unit increase in the ACA, the increase was the smallest in this age group.<p>CONCLUSION: It will be prudent to measure the both the magnitude and axis of the PCA, particularly in those above 60y rather than rely on rule-of-thumb calculations based on ACA parameters for IOL power calculation.http://ies.ijo.cn/cn_publish/2017/11/201711002.pdfanterior corneal astigmatismposterior corneal astigmatismage groupsage groups |
| spellingShingle | Vijay Shetty Suhas S Haldipurkar Rita Dhamankar Tanvi Haldipurkar Onkar Pirdankar Maninder Singh Setia Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysis Guoji Yanke Zazhi anterior corneal astigmatism posterior corneal astigmatism age groups age groups |
| title | Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysis |
| title_full | Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysis |
| title_fullStr | Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysis |
| title_full_unstemmed | Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysis |
| title_short | Association between anterior corneal astigmatism and posterior corneal astigmatism across age groups: a cross-sectional analysis |
| title_sort | association between anterior corneal astigmatism and posterior corneal astigmatism across age groups a cross sectional analysis |
| topic | anterior corneal astigmatism posterior corneal astigmatism age groups age groups |
| url | http://ies.ijo.cn/cn_publish/2017/11/201711002.pdf |
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