Photon Trajectory in the Human Cornea
| Autor: | Odaibo, Stephen G. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | In this article, we follow the trajectory of a photon in the human cornea. Prior to experimental evidence of the cornea's gradient refractive index (GRIN) nature, schematic eye models used a constant or average as the corneal refractive index. A few recent models respect the intra-corneal GRIN, but are based on the paraxial approximation, and thereby have limited validity in peripheral visual field analysis and non-paraxial photon tracking. Here, we introduce the Trajectron algorithm. It uses a closed form solution of the ray equation of constant axial GRIN media, and evaluates over piece-wise constant GRIN. Using Trajectron, we present the first quantitative demonstration of non-paraxial intra-corneal light-bending phenomena. This demonstration has significant implications in the development of refractive surgery algorithms. Comment: 19 pages, 3 figures |
| Databáze: | arXiv |
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