ArticleJournal of optometry
Influence of angle Kappa on the optimal intraocular orientation of asymmetric multifocal intraocular lenses.
Article in Journal of optometry. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- A review of angle kappa and multifocal intraocular lenses and their effect on visual outcomes.Acta ophthalmologica · 2026Review
- Chord mu and chord alpha as postoperative predictors in multifocal intraocular lens implantation.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024Review
- Angle Kappa is Not Correlated with Patient-Reported Outcomes After Multifocal Lens Implantation.Clinical ophthalmology (Auckland, N.Z.) · 2024Article
- Bibliometric analysis of research relating to refractive cataract surgery over a 20-year period: from 2003 to 2022.International journal of ophthalmology · 2023Article
- Intrasession repeatability and agreement of a new method to measure the foveal fixation axis.PeerJ · 2023Article
- The Influence of Angle Alpha, Angle Kappa, and Optical Aberrations on Visual Outcomes after the Implantation of a High-Addition Trifocal IOL.Journal of clinical medicine · 2022Article
- Outcomes of a Refractive Segmented Bifocal Intraocular Lens with a Lower Near Addition.Clinical ophthalmology (Auckland, N.Z.) · 2022Article
- The relationship between angle kappa and astigmatism after phacoemulsification with implanting of spherical and aspheric intraocular lens.Indian journal of ophthalmology · 2021Article
- Effect of the kappa angle on depth of focus after implantation of the TECNIS Symfony intraocular lens.International ophthalmology · 2021Article
- Angle alpha as predictor for improving patient satisfaction with multifocal intraocular lenses?Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2021Article
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Authors and funding
5 authors.
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Abstract
purposeto evaluate the effects of kappa angle and intraocular orientation on the theoretical performance of asymmetric multifocal intraocular lenses (MIOL).
methodsFor a total of 21 corneal aberrations, a computational analysis simulated the implantation of a computationally designed MIOL. An image quality parameter (IQ) (visually modulated transfer function metric) was calculated for a 5.0-mm pupil and for three conditions: distance, intermediate, and near vision. The procedure was repeated for each eye after a rotation of the MIOL with respect to the cornea from 0º to 360º in 5º steps. Kappa angles from 0 to 900 microns, in 150 microns steps, combined with two two variants of MIOL centration were tested: in the corneal apex or in the center of the entrance pupil. A p-value ≤ 0.05 was considered significant.
resultsThere were statistically significant differences of the IQ depending of the intraocular orientation of the MIOL. If kappa angle was increased, there was a statistically significant decrease of the IQ. The IQ maintained stable when the optimal intraocular orientation was re-calculated for each kappa angle. In general, the inter-variability of the results between subjects was very high. There were no strong evidences supporting that there exists a preferable centration point.
conclusionsOur results suggest that kappa angle theoretically affects significantly the performance of asymmetric MIOL implantation. However, its negative effect can be compensated if a customized intraocular orientation is calculated taking into account the presence of the kappa angle.
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