### 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 (US) |
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Pages (from-to) | 4600-4608 |

Number of pages | 9 |

Journal | Applied Optics |

Volume | 34 |

Issue number | 21 |

DOIs | |

State | Published - Jul 1995 |

### Keywords

- Cornea
- Laser surgery
- Model.

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

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## Cite this

*Applied Optics*,

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