A Mathematic Model to Correct Myopic Astigmatism

Author

Ye Han

Author_Institution

Sch. of Mechatron. Eng., NanChang Univ., Nanchang, China

fYear

2010

fDate

18-20 June 2010

Firstpage

1

Lastpage

4

Abstract

The corneal surface was modeled as a torus before ablation, and the corneal surface was modeled as a sphere after ablation in the myopic astigmatism eye. So the mathematic model to determine the ablation profile in LASIK or PRK was deduced according the two surfaces . The two different-radii of curvature of the torus along its orthogonal meridians were determined by the deepest and flattest section of the corneal measure by topographic observation. The mathematic model was applied in the software to correct refractive error in the ophthalmic excimer laser system produced by Su Zhou 66 Vision Tech Co., Ltd. The results showed the mathematic model is safe and effective to correct myopic astigmatism.

Keywords

eye; laser ablation; laser applications in medicine; vision defects; LASIK; PRK; ablation profile; corneal surface; eye; mathematic model; myopic astigmatism; ophthalmic excimer laser system; orthogonal meridians; refractive error; torus curvature different-radii; Cornea; Error correction; Humans; Mathematical model; Mathematics; Optical refraction; Shape; Size control; Surface topography; Vision defects;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on

Conference_Location

Chengdu

ISSN

2151-7614

Print_ISBN

978-1-4244-4712-1

Electronic_ISBN

2151-7614

Type

conf

DOI

10.1109/ICBBE.2010.5516494

Filename

5516494