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Titel: Prediction of ocular magnification and aniseikonia after cataract surgery
VerfasserIn: Langenbucher, Achim
Szentmáry, Nóra
Cayless, Alan
Wendelstein, Jascha
Hoffmann, Peter
Sprache: Englisch
Titel: Acta Ophthalmologica
Bandnummer: 100
Heft: 8
Seiten: e1675-e1684
Verlag/Plattform: Wiley
Erscheinungsjahr: 2022
Freie Schlagwörter: aniseikonia
biometry
interocular symmetry
anisometropia
paraxial optics
lens power calculation
matrix calculation
ocular magnification
DDC-Sachgruppe: 610 Medizin, Gesundheit
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Background: Ocular magnification and aniseikonia after cataract surgery has been widely ignored in modern cataract surgery. The purpose of this study was to analyse ocular magnification and inter-individual differences in a normal cataract population with a focus on monovision. Methods: From a large dataset containing biometric measurements (IOLMaster 700)ofbotheyesof9734patientsprior tocataractsurgery,eyeswereindexedrandomly as primary (P) and secondary (S). Intraocular lens power (IOLP) was derived for the HofferQ, Haigis and Castrop formulae for emmetropia for P and emmetropia or myopia (−0.5 to−2 dpt) for S to simulate monovision. Based on the pseudophakic eye model in addition to these formulae, ocular magnification was extracted using matrix algebra (refractionand translationmatrices anda systemmatrix describing theoptical property of the entire spectacle corrected or uncorrected eye). Results: With emmetropia for P and S the IOLP differences (S-P) showed a standard deviation of 0.162/0.156/0.157 dpt and ocular magnification differences yielded a standard deviation of 0.0414/0.0405/0.0408 mm/mrad for the HofferQ/ Haigis/Castrop setting. Simulating monovision, the myopic eye (S) showed a systematically smaller mean absolute spectacle corrected ocular magnification than the emmetropic eye (−0.0351/−0.0340/−0.0336, respectively, relative magnification around 2%). If myopia in the S eye remains uncorrected, the reduction of ocular magnification is much smaller (around 0.2–0.3%). Conclusion: Vergence formulae for IOLP calculation sometimes implicitly define a pseudophakic eye model which can be directly used to predict ocular magnification after cataract surgery. Despite a strong similarity of both eyes, ocular magnification does not fully match between eyes and the prediction of ocular magnification and aniseikonia might be relevant to avoid eikonic problems in the pseudophakic eye.
DOI der Erstveröffentlichung: 10.1111/aos.15190
URL der Erstveröffentlichung: https://doi.org/10.1111/aos.15190
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-411641
hdl:20.500.11880/36936
http://dx.doi.org/10.22028/D291-41164
ISSN: 1755-3768
1755-375X
Datum des Eintrags: 24-Nov-2023
Fakultät: M - Medizinische Fakultät
Fachrichtung: M - Augenheilkunde
Professur: M - Univ.-Prof. Dr. Dipl.-Ing. Achim Langenbucher
M - Prof. Dr. med. Nóra Szentmáry
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes



Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons Creative Commons