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

Fabrice Manns, Jin Hui Shen, Per Sod̈erberg, Takaaki Matsui, Jean-Marie A Parel

Research output: Contribution to journalArticle

17 Citations (Scopus)

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/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.

Original languageEnglish
Pages (from-to)4600-4608
Number of pages9
JournalApplied Optics
Volume34
Issue number21
DOIs
StatePublished - Jan 1 1995

Fingerprint

Ablation
Laser beams
myopia
laser beams
Scanning
scanning
Gaussian beams
Gaussian distribution
Topography
Spatial distribution
ablation
Laser pulses
Surface roughness
Radiation
pulses
normal density functions
topography
spatial distribution
roughness
radiation

Keywords

  • Cornea
  • Laser surgery
  • Model.

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

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.

In: Applied Optics, Vol. 34, No. 21, 01.01.1995, p. 4600-4608.

Research output: Contribution to journalArticle

Manns, Fabrice ; Shen, Jin Hui ; Sod̈erberg, Per ; Matsui, Takaaki ; Parel, Jean-Marie A. / Development of an algorithm for corneal reshaping with a scanning laser beam. In: Applied Optics. 1995 ; Vol. 34, No. 21. pp. 4600-4608.
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