摘要
激光角膜热成形技术(LTK)在矫正远视临床中占有重要的应用前景。为了了解铥激光与角膜组织热相互作用中激光参数和角膜光学及热物性参数对温度场分布的影响,选取50W/cm2,55W/cm2,60W/cm2三种功率密度,1s、2s、3s三种作用时间,用有限元方法模拟了激光作用下角膜组织内温度场的分布。模拟结果表明激光有效穿透深度与激光功率密度和时间都是正向相关,而与能量密度的正向相关性较差;激光作用时间越长,角膜组织中的温度梯度越小。模拟得到激光功率密度50W/cm2作用时间1s适合于LTK。
LTK(laser thermal keratoplasty) will has a important application future for correction of hyperopia.The temperature distribution in cornea which radiated by Tm laser with power density 50W/cm2,55W/cm2 and 60W/cm2 and treatment time ls,2s and 3s respectively was simulated by finite element method,in order to understanding influence of temperature distribution on laser,optical and thermal parameters of cornea.The results indicated that laser effective penetrating depth and laser power density and radiating ti...
出处
《激光杂志》
CAS
CSCD
北大核心
2008年第4期80-82,共3页
Laser Journal
基金
上海市教育发展基金会资助(晨光计划
编号:2007CG62)
关键词
激光
老视
光热效应
角膜
LTK
laser
hyperopia
photothermal effect
cornea
LTK
