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A Ray Tracer for Ophthalmological Applications


Ray tracing with a computer allows realistic simulation of optical properties of the human eye. Patterns of point sources are used as objects. The path of light rays is calculated between the point source and the retina for a Gullstrand exact schematic eye model with improved parameters; the normal eye model has a resolution limit close to the natural resolution limit of the human eye. The image formed on the retina is projected back to a screen at the distance of the object so as to simulate image interpretation by the brain. Refractive errors are modeled by a change in eye parameters and corrected by eyeglasses or/and contact lenses or by an artificial intraocular lens. For optic correction the parameters of seeing aids can be fitted automatically by a least-squares routine.

(Available for PCs with MS-DOS, WIN-3.1, WIN-95/98/... and WIN-NT only!)

How to work with "teye.exe":
1. Create a subdirectory of your choice
2. Copy the file "" to that subdirectory
3. Extract the file "teye.exe" by unzipping the file ""
4. Open a DOS-Shell and go to the subdirectory where "teye.exe" is
5. Start "teye.exe"

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Contact Information

Wolfgang Fink, Ph. D.
Senior Researcher at Jet Propulsion Laboratory (JPL)
Visiting Research Associate Professor of Ophthalmology at University of Southern California (USC)
Visiting Research Associate Professor of Neurosurgery at University of Southern California (USC)
Visiting Associate in Physics at California Institute of Technology (Caltech)

Mailing Address:
California Institute of Technology
Visual and Autonomous Exploration Systems Research Laboratory
15 Keith Spalding (corner of E. California Blvd & S. Wilson Ave)
Mail Code 103-33
Pasadena, CA 91125

Phone: 1-626-395-4587
Fax: 1-626-395-4587

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