Efficacy of keratometric values obtained from Sirius topographer® in nidek axial length-scan® for intraocular lens calculation after penetrating keratoplasty

•Cataract is one of the reasons which Decreases visual acuity after penetrating keratoplasty (PK).•Calculation of IOL power is more difficult in eyes with PK than in eyes with naive corneas.•Studies in the literature have shown that optical biometry and Scheimpflug camera combined with Placido-disc...

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Published inPhotodiagnosis and photodynamic therapy Vol. 41; p. 103195
Main Authors Kandemir Besek, Nilay, Asık Nacaroglu, Senay, Kırgız, Ahmet, Ozturk Karabulut, Gamze, Okmen, Helin, Ahmet, Sibel
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.03.2023
Subjects
Adult
Aged
Cataract surgery
Cornea - surgery
Humans
Keratoplasty, Penetrating
Lenses, Intraocular
Middle Aged
Optical biometry
Penetrating keratoplasty
Photochemotherapy - methods
Photosensitizing Agents
Retrospective Studies
Scheimpflug topography
Cataract surgery
Penetrating keratoplasty
Scheimpflug topography
Optical biometry
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Summary:•Cataract is one of the reasons which Decreases visual acuity after penetrating keratoplasty (PK).•Calculation of IOL power is more difficult in eyes with PK than in eyes with naive corneas.•Studies in the literature have shown that optical biometry and Scheimpflug camera combined with Placido-disc corneal topography gives similar results in calculating IOL power in naive corneas. To evaluate the accuracy of keratometric values obtained from Scheimpflug (Sirius) topography using Nidek AL-Scan optical biometry (OB) for intraocular lens (IOL) power calculating after penetrating keratoplasty (PK). Thirty eyes of 26 patients were included in this study. The demographic information, complete ophthalmic examination, IOL calculation technique, and its effect on final refractive results were evaluated. The mean age of the patients was 52.76 ± 16.20 years. The mean K readings using Nidek AL-Scan OB, mean simulated K (SimK) (3mm), and mean pupillary power (MPP) (4.5mm) K readings using Sirius were 41.92 ± 5.05 D, 42.99 ± 5.78 D, and 43.30±6.23 D (p= 0.515). Both devices correctly calculated IOL power after PK; however, Sirius SimK (3mm) gave the lowest mean absolute error (MAE) results and can be safely used for IOL power calculation.
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ISSN:1572-1000
1873-1597
DOI:10.1016/j.pdpdt.2022.103195