Ablation rate of PMMA and human cornea with a frequency-quintupled Nd

YAG laser (213 nm)

Jin H. Shen, Karen M. Joos, Fabrice Manns, Qiushi Ren, Franz Fankhauser, David Denham, Per G. Söderberg, Jean-Marie A Parel

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Background and Objective: As an alternative to the standard excimer laser used for PRK, we investigated the ablation rate at 213 nm of PMMA, and human corneas under controlled hydration. Study Design/Materials and Methods: The output of a frequency-quintupled Nd:YAG laser (213 nm) was transformed into a quasi-Gaussian beam. PMMA and corneal lenticules maintained under controlled hydration were ablated until perforation was detected. Results: The ablation rate of PMMA and cornea at 213 nm were similar to that at 193 nm when radiant exposure was below 200 mJ/cm2 and increased gradually between one and two times faster than that at 193 nm when radiant exposure was > 200 mJ/cm2. Conclusions: PMMA and cornea ablation at 213 nm are similar to that at 193 nm and are different from that at 248 nm. The difference between PMMA and cornea ablation rates should be considered when using PMMA to test ablated diopter and smoothness for photorefractive surgery.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalLasers in Surgery and Medicine
Volume21
Issue number2
DOIs
StatePublished - Aug 21 1997

Fingerprint

Solid-State Lasers
Polymethyl Methacrylate
Cornea
Excimer Lasers

Keywords

  • Laser corneal surgery
  • Laser-tissue interaction
  • Photorefractive keratectomy
  • PRK, poly-methyl-methacrylate
  • Solid-state laser
  • Ultraviolet

ASJC Scopus subject areas

  • Surgery

Cite this

Ablation rate of PMMA and human cornea with a frequency-quintupled Nd : YAG laser (213 nm). / Shen, Jin H.; Joos, Karen M.; Manns, Fabrice; Ren, Qiushi; Fankhauser, Franz; Denham, David; Söderberg, Per G.; Parel, Jean-Marie A.

In: Lasers in Surgery and Medicine, Vol. 21, No. 2, 21.08.1997, p. 179-185.

Research output: Contribution to journalArticle

Shen, Jin H. ; Joos, Karen M. ; Manns, Fabrice ; Ren, Qiushi ; Fankhauser, Franz ; Denham, David ; Söderberg, Per G. ; Parel, Jean-Marie A. / Ablation rate of PMMA and human cornea with a frequency-quintupled Nd : YAG laser (213 nm). In: Lasers in Surgery and Medicine. 1997 ; Vol. 21, No. 2. pp. 179-185.
@article{4d476b5a9d49490eb5313ec2c102c621,
title = "Ablation rate of PMMA and human cornea with a frequency-quintupled Nd: YAG laser (213 nm)",
abstract = "Background and Objective: As an alternative to the standard excimer laser used for PRK, we investigated the ablation rate at 213 nm of PMMA, and human corneas under controlled hydration. Study Design/Materials and Methods: The output of a frequency-quintupled Nd:YAG laser (213 nm) was transformed into a quasi-Gaussian beam. PMMA and corneal lenticules maintained under controlled hydration were ablated until perforation was detected. Results: The ablation rate of PMMA and cornea at 213 nm were similar to that at 193 nm when radiant exposure was below 200 mJ/cm2 and increased gradually between one and two times faster than that at 193 nm when radiant exposure was > 200 mJ/cm2. Conclusions: PMMA and cornea ablation at 213 nm are similar to that at 193 nm and are different from that at 248 nm. The difference between PMMA and cornea ablation rates should be considered when using PMMA to test ablated diopter and smoothness for photorefractive surgery.",
keywords = "Laser corneal surgery, Laser-tissue interaction, Photorefractive keratectomy, PRK, poly-methyl-methacrylate, Solid-state laser, Ultraviolet",
author = "Shen, {Jin H.} and Joos, {Karen M.} and Fabrice Manns and Qiushi Ren and Franz Fankhauser and David Denham and S{\"o}derberg, {Per G.} and Parel, {Jean-Marie A}",
year = "1997",
month = "8",
day = "21",
doi = "10.1002/(SICI)1096-9101(1997)21:2<179::AID-LSM9>3.0.CO;2-N",
language = "English",
volume = "21",
pages = "179--185",
journal = "Lasers in Surgery and Medicine",
issn = "0196-8092",
publisher = "Wiley-Liss Inc.",
number = "2",

}

TY - JOUR

T1 - Ablation rate of PMMA and human cornea with a frequency-quintupled Nd

T2 - YAG laser (213 nm)

AU - Shen, Jin H.

AU - Joos, Karen M.

AU - Manns, Fabrice

AU - Ren, Qiushi

AU - Fankhauser, Franz

AU - Denham, David

AU - Söderberg, Per G.

AU - Parel, Jean-Marie A

PY - 1997/8/21

Y1 - 1997/8/21

N2 - Background and Objective: As an alternative to the standard excimer laser used for PRK, we investigated the ablation rate at 213 nm of PMMA, and human corneas under controlled hydration. Study Design/Materials and Methods: The output of a frequency-quintupled Nd:YAG laser (213 nm) was transformed into a quasi-Gaussian beam. PMMA and corneal lenticules maintained under controlled hydration were ablated until perforation was detected. Results: The ablation rate of PMMA and cornea at 213 nm were similar to that at 193 nm when radiant exposure was below 200 mJ/cm2 and increased gradually between one and two times faster than that at 193 nm when radiant exposure was > 200 mJ/cm2. Conclusions: PMMA and cornea ablation at 213 nm are similar to that at 193 nm and are different from that at 248 nm. The difference between PMMA and cornea ablation rates should be considered when using PMMA to test ablated diopter and smoothness for photorefractive surgery.

AB - Background and Objective: As an alternative to the standard excimer laser used for PRK, we investigated the ablation rate at 213 nm of PMMA, and human corneas under controlled hydration. Study Design/Materials and Methods: The output of a frequency-quintupled Nd:YAG laser (213 nm) was transformed into a quasi-Gaussian beam. PMMA and corneal lenticules maintained under controlled hydration were ablated until perforation was detected. Results: The ablation rate of PMMA and cornea at 213 nm were similar to that at 193 nm when radiant exposure was below 200 mJ/cm2 and increased gradually between one and two times faster than that at 193 nm when radiant exposure was > 200 mJ/cm2. Conclusions: PMMA and cornea ablation at 213 nm are similar to that at 193 nm and are different from that at 248 nm. The difference between PMMA and cornea ablation rates should be considered when using PMMA to test ablated diopter and smoothness for photorefractive surgery.

KW - Laser corneal surgery

KW - Laser-tissue interaction

KW - Photorefractive keratectomy

KW - PRK, poly-methyl-methacrylate

KW - Solid-state laser

KW - Ultraviolet

UR - http://www.scopus.com/inward/record.url?scp=0030834176&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030834176&partnerID=8YFLogxK

U2 - 10.1002/(SICI)1096-9101(1997)21:2<179::AID-LSM9>3.0.CO;2-N

DO - 10.1002/(SICI)1096-9101(1997)21:2<179::AID-LSM9>3.0.CO;2-N

M3 - Article

VL - 21

SP - 179

EP - 185

JO - Lasers in Surgery and Medicine

JF - Lasers in Surgery and Medicine

SN - 0196-8092

IS - 2

ER -