### Abstract

The corneal-ablation rate, the beam-intensity distribution, and the initial and the desired corneal topographies are used to calculate a spatial distribution map of laser pulses. The optimal values of the parameters are determined with a computer model, for a system that produces 213-nm radiation with a Gaussian beam-intensity distribution and a peak radiant exposure of 400 mJ/cm^{2}. The model shows that with a beam diameter of 0.5 mm, an overlap of 80%, and a 5-mm treatment zone, the roughness is less than 6% of the central ablation depth, the refractive error after correction is less than 0.1 D for corrections of myopia of 1, 3, and 6 D and less than 0.4 D for a correction of myopia of 10 D, and the number of pulses per diopter of correction is 2500 when the beam-intensity distribution is Gaussian and 580 when it is flat.

Original language | English |
---|---|

Pages (from-to) | 4600-4608 |

Number of pages | 9 |

Journal | Applied Optics |

Volume | 34 |

Issue number | 21 |

DOIs | |

State | Published - Jan 1 1995 |

### Fingerprint

### Keywords

- Cornea
- Laser surgery
- Model.

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

### Cite this

*Applied Optics*,

*34*(21), 4600-4608. https://doi.org/10.1364/AO.34.004600

**Development of an algorithm for corneal reshaping with a scanning laser beam.** / Manns, Fabrice; Shen, Jin Hui; Sod̈erberg, Per; Matsui, Takaaki; Parel, Jean-Marie A.

Research output: Contribution to journal › Article

*Applied Optics*, vol. 34, no. 21, pp. 4600-4608. https://doi.org/10.1364/AO.34.004600

}

TY - JOUR

T1 - Development of an algorithm for corneal reshaping with a scanning laser beam

AU - Manns, Fabrice

AU - Shen, Jin Hui

AU - Sod̈erberg, Per

AU - Matsui, Takaaki

AU - Parel, Jean-Marie A

PY - 1995/1/1

Y1 - 1995/1/1

N2 - The corneal-ablation rate, the beam-intensity distribution, and the initial and the desired corneal topographies are used to calculate a spatial distribution map of laser pulses. The optimal values of the parameters are determined with a computer model, for a system that produces 213-nm radiation with a Gaussian beam-intensity distribution and a peak radiant exposure of 400 mJ/cm2. The model shows that with a beam diameter of 0.5 mm, an overlap of 80%, and a 5-mm treatment zone, the roughness is less than 6% of the central ablation depth, the refractive error after correction is less than 0.1 D for corrections of myopia of 1, 3, and 6 D and less than 0.4 D for a correction of myopia of 10 D, and the number of pulses per diopter of correction is 2500 when the beam-intensity distribution is Gaussian and 580 when it is flat.

AB - The corneal-ablation rate, the beam-intensity distribution, and the initial and the desired corneal topographies are used to calculate a spatial distribution map of laser pulses. The optimal values of the parameters are determined with a computer model, for a system that produces 213-nm radiation with a Gaussian beam-intensity distribution and a peak radiant exposure of 400 mJ/cm2. The model shows that with a beam diameter of 0.5 mm, an overlap of 80%, and a 5-mm treatment zone, the roughness is less than 6% of the central ablation depth, the refractive error after correction is less than 0.1 D for corrections of myopia of 1, 3, and 6 D and less than 0.4 D for a correction of myopia of 10 D, and the number of pulses per diopter of correction is 2500 when the beam-intensity distribution is Gaussian and 580 when it is flat.

KW - Cornea

KW - Laser surgery

KW - Model.

UR - http://www.scopus.com/inward/record.url?scp=0000918266&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000918266&partnerID=8YFLogxK

U2 - 10.1364/AO.34.004600

DO - 10.1364/AO.34.004600

M3 - Article

VL - 34

SP - 4600

EP - 4608

JO - Applied Optics

JF - Applied Optics

SN - 1559-128X

IS - 21

ER -