Computerized analysis of the effects of intraocular lens edge design on the quality of vision in pseudophakic patients
| Autor: | Eleonora Vaccari, Alessandro Franchini, Barbara Zamma Gallarati |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Pseudophakia medicine.medical_treatment Acrylic Resins Intraocular lens Edge (geometry) Prosthesis Design Glare Vision disorder Optics medicine Humans Scattering Radiation Computer Simulation Vision Ocular Lenses Intraocular business.industry Glare (vision) Models Theoretical Ray Sensory Systems Intensity (physics) Ophthalmology Quality of vision Surgery Intraocular lens edge design medicine.symptom business |
| Zdroj: | Journal of cataract and refractive surgery. 29(2) |
| ISSN: | 0886-3350 |
| Popis: | Purpose To study the distribution and intensity of reflected glare images from 3 intraocular lens (IOL) edge designs. Setting Eye Institute, University of Florence, Florence, Italy. Methods The interaction of light rays as a function of edge design was evaluated using an experimental eye model and an advanced ray-tracing program. Three hydrophobic acrylic IOLs were studied: an acrylic square-edged (sharp) design, an acrylic round-edged design, and a new acrylic IOL with a rounded anterior edge and a sharp posterior edge. Results The rays hitting the sharp edge of an IOL caused peripheral arcs or circles of light on the side of the retina opposite the focused image. Edge reflections also occurred with the round-edged IOL, but the intensity of the reflected image was one tenth that of the intensity with the sharp-edged design. The new round-/sharp-edged design reduced the maximum intensity of the reflected image to one third the intensity of the sharp-edged reflected image. Conclusions The experimental findings with an acrylic IOL that combines a sharp posterior edge with a low incidence of reflected edge glare are promising. |
| Databáze: | OpenAIRE |
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