Laser applications in glaucoma filtering surgery

Author

Berlin, Michael S. ; Ahn, Roy

Author_Institution

Ophthalmology & Laser Res. Labs., Cedars-Sinai Med. Center, Los Angeles, CA, USA

fYear

1993

fDate

15-18 Nov 1993

Firstpage

254

Abstract

Summary form only given. Laser sclerostomy essentially requires that the organic polymers of the sclera are fragmented and ejected in a gaseous state. This tissue phase change may be brought about by 1) photovaporization: thermal molecular fragmentation; 2) photodisruption: plasma expansion and predominantly mechanical molecular fragmentation, or 3) photodissociation: direct nonthermal decomposition. Lasers currently available to achieve these ends include: holmium:YAG (photothermal), Q-switched Nd:YAG (photodisruptive), excimer and erbium:YAG (photodissociative). This presentation reviews these laser systems and their current efficacy in laser sclerostomy

Keywords

biomolecular effects of radiation; biothermics; excimer lasers; eye; laser applications in medicine; neodymium; photodissociation; photothermal effects; radiation therapy; solid lasers; surgery; vaporisation; Er:YAG lasers; Ho:YAG lasers; Q-switched Nd:YAG lasers; YAG:Er; YAG:Ho; YAG:Nd; YAl5O12:Er; YAl5O12:Ho; YAl5O12:Nd; direct nonthermal decomposition; excimer lasers; gaseous state; glaucoma filtering surgery; laser applications; laser sclerostomy; laser systems; mechanical molecular fragmentation; organic polymers; photodisruption; photodissociation; photovaporization; plasma expansion; sclera; thermal molecular fragmentation; tissue phase change; Cornea; Filtering; Gas lasers; Laboratories; Laser applications; Laser surgery; Medical treatment; Optical control; Thermal decomposition; Thermal expansion;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Society Annual Meeting, 1993. LEOS '93 Conference Proceedings. IEEE

Conference_Location

San Jose, CA

Print_ISBN

0-7803-1263-5

Type

conf

DOI

10.1109/LEOS.1993.379014

Filename

379014