Computer modeling of visual impairment caused by intraocular lens misalignment
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
9888085
DOI
10.1016/s0886-3350(99)80019-4
PII: S0886-3350(99)80019-4
Knihovny.cz E-resources
- MeSH
- Astigmatism etiology MeSH
- Models, Biological * MeSH
- Humans MeSH
- Foreign-Body Migration complications MeSH
- Myopia etiology MeSH
- Lenses, Intraocular adverse effects MeSH
- Computer Simulation * MeSH
- Vision Disorders diagnosis etiology MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
PURPOSE: To evaluate a computer program to modulate the visual impairment caused by intraocular lens (IOL) misalignment and visualize results obtained by numerical calculations. SETTING: Department of Ophthalmology, Medical Faculty of Charles University, Prague, Czech Republic. METHODS: The optic imagery of a Landolt circle was calculated using a ray-tracing computer program. Visual aberrations resulting from a decentered and/or tilted IOL were studied using this program and compared with theoretical calculations. RESULTS: The IOL decentration and/or tilt shifted the postoperative refractive errors toward myopia and astigmatism (oblique). The combination of IOL decentration and tilt produced a refractive error that depended on the relationship between the geometrical axes of the decentration and tilt. The refractive error can be enhanced or diminished depending on the relationship of these axes. CONCLUSIONS: These findings verify the results calculated by paraxial vergence equations. A ray-tracing program simulated the optic imagery for various kinds of IOL misalignment and IOL optic properties.
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