Objective To establish excimer laser cornea correction mathematical model.Methods Based on the diopter status of myopia and hypermetropia,the author presented the principle of excimer laser refractive surgery,the change of impacting cornea curvature on the cornea diopter.The exact mathematics model of the refractive myopia and hypermetropia were established in details .The relationship between ablation depth and diopter and surgery zone was also discussed.The model had been used for guiding the myopia,hyperopia diopter correction.Results The clinical statistics showed that in 163 eyes operated,approximately 81.6% of patient’s with uncorrected vision of 20/25 or better.Conclusion The mathematics model meets clinical requirement and is safe for practical use.
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