1. A New Method for Reconstruction of Corneal Topography with Placido Disk System
- Author
-
Chao Yuan, Ren Kai Ge, Minghua Zhou, De Wei Gong, and Jian Hai Chen
- Subjects
medicine.diagnostic_test ,business.industry ,General Engineering ,Skew ,Placido disk ,Corneal topography ,medicine.anatomical_structure ,Optics ,Error analysis ,Cornea ,medicine ,Ray tracing (graphics) ,Computer vision ,Artificial intelligence ,Corneal surface ,business ,Geology - Abstract
Many methods to reconstruct the corneal topography are based on the Placido disk system. The skew rays can contribute errors to the system when using the reflection image with these methods. To overcome this limitation, a backward ray tracing technique is developed. By performing this technique, a continuous surface representation of the cornea is obtained. The error analysis shows an enhanced accuracy in reconstructing the corneal topography. The colormaps of corneal surface powers are also drawn for graphic representations of corneal topography.
- Published
- 2014