Please use this identifier to cite or link to this item:
doi:10.22028/D291-36851
Title: | Meridional ocular magnification after cataract surgery with toric and non-toric intraocular lenses |
Author(s): | Langenbucher, Achim Hoffmann, Peter Cayless, Alan Wendelstein, Jascha Bolz, Matthias Szentmáry, Nóra |
Language: | English |
Title: | Graefe's Archive for Clinical and Experimental Ophthalmology |
Publisher/Platform: | Springer Nature |
Year of Publication: | 2022 |
Free key words: | Ocular magnification Image distortion Aniseikonia 4 × 4 matrix calculation Paraxial optics Vergence formula |
DDC notations: | 610 Medicine and health |
Publikation type: | Journal Article |
Abstract: | Background Overall ocular magnification (OOM) and meridional ocular magnification (MOM) with consequent image distortions have been widely ignored in modern cataract surgery. The purpose of this study was to investigate OOM and MOM in a general situation with an astigmatic refracting surface. Methods From a large dataset containing biometric measurements (IOLMaster 700) of both eyes of 9734 patients prior to cataract surgery, the equivalent (PIOLeq) and cylindric power (PIOLcyl) were derived for the HofferQ, Haigis, and Castrop formulae for emmetropia. Based on the pseudophakic eye model, OOM and MOM were extracted using 4 × 4 matrix algebra for the corrected eye (with PIOLeq/PIOLcyl (scenario 1) or with PIOLeq and spectacle correction of the residual refractive cylinder (scenario 2) or with PIOLeq remaining the residual uncorrected refractive cylinder (blurry image) (scenario 3)). In each case, the relative image distortion of MOM/OOM was calculated in %. Results On average, PIOLeq/PIOLcyl was 20.73 ± 4.50 dpt/1.39 ± 1.09 dpt for HofferQ, 20.75 ± 4.23 dpt/1.29 ± 1.01 dpt for Haigis, and 20.63 ± 4.31 dpt/1.26 ± 0.98 dpt for Castrop formulae. Cylindric refraction for scenario 2 was 0.91 ± 0.70 dpt, 0.89 ± 0.69 dpt, and 0.89 ± 0.69 dpt, respectively. OOM/MOM (× 1000) was 16.56 ± 1.20/0.08 ± 0.07, 16.56 ± 1.20/0.18 ± 0.14, and 16.56 ± 1.20/0.08 ± 0.07 mm/mrad with HofferQ; 16.64 ± 1.16/0.07 ± 0.06, 16.64 ± 1.16/0.18 ± 0.14, and 16.64 ± 1.16/0.07 ± 0.06 mm/mrad with Haigis; and 16.72 ± 1.18/0.07 ± 0.05, 16.72 ± 1.18/0.18 ± 0.14, and 16.72 ± 1.18/0.07 ± 0.05 mm/mrad with Castrop formulae. Mean/95% quantile relative image distortion was 0.49/1.23%, 0.41/1.05%, and 0.40/0.98% for scenarios 1 and 3 and 1.09/2.71%, 1.07/2.66%, and 1.06/2.64% for scenario 2 with HofferQ, Haigis, and Castrop formulae. Conclusion Matrix representation of the pseudophakic eye allows for a simple and straightforward prediction of OOM and MOM of the pseudophakic eye after cataract surgery. OOM and MOM could be used for estimating monocular image distortions, or differences in overall or meridional magnifications between eyes. |
DOI of the first publication: | 10.1007/s00417-022-05740-4 |
URL of the first publication: | https://link.springer.com/article/10.1007/s00417-022-05740-4 |
Link to this record: | urn:nbn:de:bsz:291--ds-368518 hdl:20.500.11880/33478 http://dx.doi.org/10.22028/D291-36851 |
ISSN: | 1435-702X 0721-832X |
Date of registration: | 18-Jul-2022 |
Faculty: | M - Medizinische Fakultät |
Department: | M - Augenheilkunde |
Professorship: | M - Univ.-Prof. Dr. Dipl.-Ing. Achim Langenbucher M Prof. Dr. med. Nóra Szentmáry |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Files for this record:
File | Description | Size | Format | |
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Langenbucher2022_Article_MeridionalOcularMagnificationA.pdf | 2,96 MB | Adobe PDF | View/Open |
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