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Three-dimensional ray-tracing model for the study of advanced refractive errors in keratoconus
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.ORCID iD: 0000-0002-9031-4331
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
Umeå University, Faculty of Medicine, Department of Clinical Sciences, Ophthalmology.
2016 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 55, no 3, 507-514 p.Article in journal (Refereed) Published
Abstract [en]

We propose a numerical three-dimensional (3D) ray-tracing model for the analysis of advanced corneal refractive errors. The 3D modeling was based on measured corneal elevation data by means of Scheimpflug photography. A mathematical description of the measured corneal surfaces from a keratoconus (KC) patient was used for the 3D ray tracing, based on Snell's law of refraction. A model of a commercial intraocular lens (IOL) was included in the analysis. By modifying the posterior IOL surface, it was shown that the imaging quality could be significantly improved. The RMS values were reduced by approximately 50% close to the retina, both for on-and off-axis geometries. The 3D ray-tracing model can constitute a basis for simulation of customized IOLs that are able to correct the advanced, irregular refractive errors in KC.

Place, publisher, year, edition, pages
Optical Society of America, 2016. Vol. 55, no 3, 507-514 p.
National Category
Ophthalmology
Identifiers
URN: urn:nbn:se:umu:diva-113596DOI: 10.1364/AO.55.000507ISI: 000369055100038PubMedID: 26835925OAI: oai:DiVA.org:umu-113596DiVA: diva2:886020
Available from: 2015-12-21 Created: 2015-12-21 Last updated: 2016-05-27Bibliographically approved

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Schedin, StaffanHallberg, PerBehndig, Anders
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