Research of ablation of 193nm excimer laser on cornea

Lin Zhenneng; Shen Jianxin; Liao Wenhe

The mechanism of action of excimer laser (ArF:193nm 8ns) on cornea is very important in the ablation refractive surgeries such as laser in situ keratomileusis(LASIK)and photorefractive keratectomy(PRK).In this paper,we analyze photoablation model and photophysical model that describe the mechanism of action of excimer laser (ArF:193nm 8ns) on cornea,elicit the relationship between the energy density and the ablation depth.The factors that would influence the predictability and stability of the photorefractive surgery outcome are also investigated.Then the scanning algorithm can be optimized.The results have been directly applied to the ophthalmic excimer laser system and obtain satisfactory effect in diopter correction.

1. Nanjing University of Aeronautics and Astronautics, Nanjing, 210016

Received Date: 2003-03-12

Accepted Date: 2003-06-26

Available Online: 2003-11-25

Abstract: The mechanism of action of excimer laser (ArF:193nm 8ns) on cornea is very important in the ablation refractive surgeries such as laser in situ keratomileusis(LASIK)and photorefractive keratectomy(PRK).In this paper,we analyze photoablation model and photophysical model that describe the mechanism of action of excimer laser (ArF:193nm 8ns) on cornea,elicit the relationship between the energy density and the ablation depth.The factors that would influence the predictability and stability of the photorefractive surgery outcome are also investigated.Then the scanning algorithm can be optimized.The results have been directly applied to the ophthalmic excimer laser system and obtain satisfactory effect in diopter correction.

HTML

Reference (17)

[1]	Trokel S L,Srinivasan R,Braren B.Am J Ophthalmol,1983,96:710～715.
[2]	Srinivasan R,Braren B.Chem Rev,1989,89:1303～1316.
[3]	Kitai M S,Popkov V L,Semchishen V A et al.IEEE J Q E,1991,27:302～307.
[4]	Gobbi P G,Carones F,Brancato R et al.Eur J Ophthalmol,1995,5:275～276.
[5]	Srinivasan R,Dyer P E,Braren N.Lasers Surg Med,1987,6:514～519.
[6]	Ishihara M,Arai T,Sato S et al.Lasers Surg Med,2002,30:54～59.
[7]	Siano S,Pini R,Rossi F et al.A P L,1998,72:647～649.
[8]	Siano S,Pini R,Gobbi P G et al.Lasers Surg Med,1996,20:416～425.
[9]	Schmidt H,Ihlemann J,Woff-Rottke B et al.J A P,1998,83:5458～5467.
[10]	Luk'yanchuk B N,Anisimov S,Buerle D.Appl Phys,1993,A57:367～374.
[11]	Niemz M H著.激光与生物组织的相互作用.西安:西安交通大学出版社,1999:75.
[12]	Nikogosyan D N,Gorner H.IEEE Journal of Selected Topic in Quantum Electronics,1999,5(4):1107～1115.
[13]	Pettit G H,Ediger M N,Weiblingr R P.Opt Engng,1995,34(3):661～667.
[14]	Pettit G H,Ediger M N.Appl Opt,1996,35:3386～3391.
[15]	Mrochen M,Seiler T.J Refract Surg,2001,17:584～587.
[16]	吕百达编著.激光光学.成都:四川大学出版社,1992:74.
[17]	林振能,沈建新,廖文和.激光杂志,2003,24(2):66～68.

Research of ablation of 193nm excimer laser on cornea

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views