Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population
Purpose: Barrett Universal II (BU-II) is considered as one of the most accurate intraocular lens (IOL) power calculation formulas; however, there is no literature studying the same in Indian population. The aim of this study was to evaluate the accuracy of BU-II formula in prediction of IOL power fo...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2020-01-01
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| Series: | Indian Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://www.ijo.in/article.asp?issn=0301-4738;year=2020;volume=68;issue=1;spage=59;epage=64;aulast=Kuthirummal |
| _version_ | 1819172155428962304 |
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| author | Nikhil Kuthirummal Murugesan Vanathi Ritika Mukhija Noopur Gupta Rachna Meel Rohit Saxena Radhika Tandon |
| author_facet | Nikhil Kuthirummal Murugesan Vanathi Ritika Mukhija Noopur Gupta Rachna Meel Rohit Saxena Radhika Tandon |
| author_sort | Nikhil Kuthirummal |
| collection | DOAJ |
| description | Purpose: Barrett Universal II (BU-II) is considered as one of the most accurate intraocular lens (IOL) power calculation formulas; however, there is no literature studying the same in Indian population. The aim of this study was to evaluate the accuracy of BU-II formula in prediction of IOL power for cataract surgery in Asian Indian population. This was an institutional, prospective, observational study. Methods: Patients with senile cataract who underwent phacoemulsification with posterior chamber IOL implantation were enrolled in the study. Biometry data from Lenstar-LS900 was used and IOL power was calculated using four IOL formulas: modified SRK-II, SRK/T, Olsen, and BU-II. Primary outcome was measured as the prediction error in postoperative refraction for each formula and secondary outcome was measured as the difference in mean absolute errors between the four formulas. SPSS Version-21 with P < 0.05 considered significant. Results: A total of 244 eyes were included in the study and were divided into three groups in accordance to axial length (AL): Group 1 (AL: 22–24.5 mm; N = 135), Group 2 (AL <22 mm; N = 53), and Group 3 (AL >24.5 mm; N = 56). BU-II formula gave the lowest mean absolute error (0.37 ± 0.27D) and median absolute error (0.34) in predicted postoperative refraction in the entire study population. When compared with the other formulas, mean absolute error was significantly lower in all three groups (P < 0.0005) as well, except for Olsen formula in the normal AL group, where the results were comparable (P = 0.742). Conclusion: BU-II performed as the most accurate formula in the prediction of postoperative refraction over a wide range of ALs. |
| first_indexed | 2024-12-22T20:02:41Z |
| format | Article |
| id | doaj.art-fe04018a19fa4a73a212288843e50b4b |
| institution | Directory Open Access Journal |
| issn | 0301-4738 1998-3689 |
| language | English |
| last_indexed | 2024-12-22T20:02:41Z |
| publishDate | 2020-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Indian Journal of Ophthalmology |
| spelling | doaj.art-fe04018a19fa4a73a212288843e50b4b2022-12-21T18:14:15ZengWolters Kluwer Medknow PublicationsIndian Journal of Ophthalmology0301-47381998-36892020-01-01681596410.4103/ijo.IJO_600_19Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian populationNikhil KuthirummalMurugesan VanathiRitika MukhijaNoopur GuptaRachna MeelRohit SaxenaRadhika TandonPurpose: Barrett Universal II (BU-II) is considered as one of the most accurate intraocular lens (IOL) power calculation formulas; however, there is no literature studying the same in Indian population. The aim of this study was to evaluate the accuracy of BU-II formula in prediction of IOL power for cataract surgery in Asian Indian population. This was an institutional, prospective, observational study. Methods: Patients with senile cataract who underwent phacoemulsification with posterior chamber IOL implantation were enrolled in the study. Biometry data from Lenstar-LS900 was used and IOL power was calculated using four IOL formulas: modified SRK-II, SRK/T, Olsen, and BU-II. Primary outcome was measured as the prediction error in postoperative refraction for each formula and secondary outcome was measured as the difference in mean absolute errors between the four formulas. SPSS Version-21 with P < 0.05 considered significant. Results: A total of 244 eyes were included in the study and were divided into three groups in accordance to axial length (AL): Group 1 (AL: 22–24.5 mm; N = 135), Group 2 (AL <22 mm; N = 53), and Group 3 (AL >24.5 mm; N = 56). BU-II formula gave the lowest mean absolute error (0.37 ± 0.27D) and median absolute error (0.34) in predicted postoperative refraction in the entire study population. When compared with the other formulas, mean absolute error was significantly lower in all three groups (P < 0.0005) as well, except for Olsen formula in the normal AL group, where the results were comparable (P = 0.742). Conclusion: BU-II performed as the most accurate formula in the prediction of postoperative refraction over a wide range of ALs.http://www.ijo.in/article.asp?issn=0301-4738;year=2020;volume=68;issue=1;spage=59;epage=64;aulast=Kuthirummalbarrettiol formulaprediction errorrefraction |
| spellingShingle | Nikhil Kuthirummal Murugesan Vanathi Ritika Mukhija Noopur Gupta Rachna Meel Rohit Saxena Radhika Tandon Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population Indian Journal of Ophthalmology barrett iol formula prediction error refraction |
| title | Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population |
| title_full | Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population |
| title_fullStr | Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population |
| title_full_unstemmed | Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population |
| title_short | Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population |
| title_sort | evaluation of barrett universal ii formula for intraocular lens power calculation in asian indian population |
| topic | barrett iol formula prediction error refraction |
| url | http://www.ijo.in/article.asp?issn=0301-4738;year=2020;volume=68;issue=1;spage=59;epage=64;aulast=Kuthirummal |
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