Scheimpflug camera combined with placido-disk corneal topography and optical biometry for intraocular lens power calculation

The purpose of this study was to compare the keratometry (K) values obtained by the Scheimpflug camera combined with placido-disk corneal topography (Sirius) and optical biometry (Lenstar) for intraocular lens (IOL) power calculation before the cataract surgery, and to evaluate the accuracy of postoperative refraction. 50 eyes of 40 patients were scheduled to have phacoemulsification with the implantation of a posterior chamber intraocular lens. The IOL power was calculated using the SRK/T formula with Lenstar K and K readings from Sirius. Simulated K (SimK), K at 3-, 5-, and 7-mm zones from Sirius were compared with Lenstar K readings. The accuracy of these parameters was determined by calculating the mean absolute error (MAE). The mean Lenstar K value was 44.05 diopters (D) ±1.93 (SD) and SimK, K at 3-, 5-, and 7-mm zones were 43.85 ± 1.91, 43.88 ± 1.9, 43.84 ± 1.9, 43.66 ± 1.85 D, respectively. There was no statistically significant difference between the K readings (P = 0.901). When Lenstar was used for the corneal power measurements, MAE was 0.42 ± 0.33 D, but when simK of Sirius was used, it was 0.37 ± 0.32 D (the lowest MAE (0.36 ± 0.32 D) was achieved as a result of 5 mm K measurement), but it was not statistically significant (P = 0.892). Of all the K readings of Sirius and Lenstar, Sirius 5-mm zone K readings were the best in predicting a more precise IOL power. The corneal power measurements with the Scheimpflug camera combined with placido-disk corneal topography can be safely used for IOL power calculation. © 2016, Springer Science+Business Media Dordrecht.

Yazar Kirgiz A.
Atalay K.
Kaldirim H.
Cabuk K.S.
Akdemir M.O.
Taskapili M.
Yayın Türü Article
Tek Biçim Adres https://hdl.handle.net/20.500.12628/7467
Tek Biçim Adres 10.1007/s10792-016-0330-4
Konu Başlıkları Intraocular lens power calculation
Optical biometry
Placido-disk corneal topography
Scheimpflug camera
Koleksiyonlar Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed | SOBİAD
Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu
Dergi Adı International Ophthalmology
Dergi Cilt Bilgisi 37
Dergi Sayısı 4
Sayfalar 781 - 786
Yayın Yılı 2017
Eser Adı
[dc.title]
Scheimpflug camera combined with placido-disk corneal topography and optical biometry for intraocular lens power calculation
Yazar
[dc.contributor.author]
Kirgiz A.
Yazar
[dc.contributor.author]
Atalay K.
Yazar
[dc.contributor.author]
Kaldirim H.
Yazar
[dc.contributor.author]
Cabuk K.S.
Yazar
[dc.contributor.author]
Akdemir M.O.
Yazar
[dc.contributor.author]
Taskapili M.
Yayın Yılı
[dc.date.issued]
2017
Yayıncı
[dc.publisher]
Springer Netherlands
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
The purpose of this study was to compare the keratometry (K) values obtained by the Scheimpflug camera combined with placido-disk corneal topography (Sirius) and optical biometry (Lenstar) for intraocular lens (IOL) power calculation before the cataract surgery, and to evaluate the accuracy of postoperative refraction. 50 eyes of 40 patients were scheduled to have phacoemulsification with the implantation of a posterior chamber intraocular lens. The IOL power was calculated using the SRK/T formula with Lenstar K and K readings from Sirius. Simulated K (SimK), K at 3-, 5-, and 7-mm zones from Sirius were compared with Lenstar K readings. The accuracy of these parameters was determined by calculating the mean absolute error (MAE). The mean Lenstar K value was 44.05 diopters (D) ±1.93 (SD) and SimK, K at 3-, 5-, and 7-mm zones were 43.85 ± 1.91, 43.88 ± 1.9, 43.84 ± 1.9, 43.66 ± 1.85 D, respectively. There was no statistically significant difference between the K readings (P = 0.901). When Lenstar was used for the corneal power measurements, MAE was 0.42 ± 0.33 D, but when simK of Sirius was used, it was 0.37 ± 0.32 D (the lowest MAE (0.36 ± 0.32 D) was achieved as a result of 5 mm K measurement), but it was not statistically significant (P = 0.892). Of all the K readings of Sirius and Lenstar, Sirius 5-mm zone K readings were the best in predicting a more precise IOL power. The corneal power measurements with the Scheimpflug camera combined with placido-disk corneal topography can be safely used for IOL power calculation. © 2016, Springer Science+Business Media Dordrecht.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
Intraocular lens power calculation
Konu Başlıkları
[dc.subject]
Optical biometry
Konu Başlıkları
[dc.subject]
Placido-disk corneal topography
Konu Başlıkları
[dc.subject]
Scheimpflug camera
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
0165-5701
İlk Sayfa Sayısı
[dc.identifier.startpage]
781
Son Sayfa Sayısı
[dc.identifier.endpage]
786
Dergi Adı
[dc.relation.journal]
International Ophthalmology
Dergi Sayısı
[dc.identifier.issue]
4
Dergi Cilt Bilgisi
[dc.identifier.volume]
37
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1007/s10792-016-0330-4
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/7467
Görüntülenme Sayısı ( Şehir )
Görüntülenme Sayısı ( Ülke )
Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
11
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
08 Şubat 2024 10:42
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Lenstar readings Sirius corneal (P = 0 significant measurements accuracy statistically Scheimpflug combined intraocular calculation placido-disk topography camera 32 D) 36 ± 0 lowest difference 37 ± 0 obtained between 42 ± 0 compare keratometry values evaluate Dordrecht Science+Business Springer safely precise predicting measurement)
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