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Model for predicting the optical performance of the eye in refractive surgery
S Patel1, J Marshall, F W Fitzke
1Department of Vision Science, Glasgow Caledonian University, Scotland, UK.
Refractive & Corneal Surgery
|September 1, 1993
Summary
This study presents a new eye model to predict refractive surgery outcomes. The model suggests a specific corneal shape for optimal post-surgery vision quality.
Area of Science:
- Ophthalmology
- Optical Engineering
- Biomedical Modeling
Background:
- Accurate prediction of refractive surgery outcomes is crucial for surgeons.
- Maximizing postsurgical optical quality is a primary goal alongside refractive error correction.
Purpose of the Study:
- To develop a computational eye model for predicting refractive surgery effects.
- To assess the impact of ocular parameters on optical performance post-surgery.
Main Methods:
- Utilized a model eye with aspheric surfaces, gradient index lens, and uni-index cornea.
- Employed Baker's ray tracing method for aspheric surfaces.
- Calculated lateral spherical aberration for various pupil sizes and surgical conditions.
Main Results:
- The model indicates optimal optical imagery with a flattening elliptical corneal profile (shape factor 0.65-0.85).
- This specific corneal contour is recommended for refractive surgery involving the cornea.
Conclusions:
- The developed eye model can predict refractive surgery outcomes.
- A flattening elliptical corneal shape is key to achieving superior optical quality after refractive surgery.