Acute pressure changes and possible secondary tissue changes due to laser or xenon photocoagulation

James McNair, Frederick (Fritz) Fraunfelder, R. Sloan Wilson, Lawrence J. Viernstein, Calvin Babcock

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The characteristics of intraocular "explosions" secondary to photocoagulation of the iris and retina are presented. With the xenon photocoagulator acoustical transients reached peak pressures of almost 900 mm Hg with pulse rise times of 0.3 msec. No significant pressure elevations were found with the argon laser even at maximum time and energy settings. In young healthy animal eyes exposed to high pressure transients, we detected no secondary tissue damage. The results from flat preparations of the corneal endothelium, light and electron microscopy were negative for secondary tissue damage even with eyes exposed to four intraocular explosions. Despite these results, clinical data suggested that, especially in diseased tissue, intraocular explosions induced by the xenon photocoagulator have the potential to cause ocular damage; therefore, these intraocular explosions should be avoided.

Original languageEnglish (US)
Pages (from-to)13-18
Number of pages6
JournalAmerican Journal of Ophthalmology
Volume77
Issue number1
StatePublished - 1974
Externally publishedYes

Fingerprint

Xenon
Explosions
Light Coagulation
Lasers
Pressure
Corneal Endothelium
Argon
Iris
Retina
Electron Microscopy
Light

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Acute pressure changes and possible secondary tissue changes due to laser or xenon photocoagulation. / McNair, James; Fraunfelder, Frederick (Fritz); Wilson, R. Sloan; Viernstein, Lawrence J.; Babcock, Calvin.

In: American Journal of Ophthalmology, Vol. 77, No. 1, 1974, p. 13-18.

Research output: Contribution to journalArticle

McNair, James ; Fraunfelder, Frederick (Fritz) ; Wilson, R. Sloan ; Viernstein, Lawrence J. ; Babcock, Calvin. / Acute pressure changes and possible secondary tissue changes due to laser or xenon photocoagulation. In: American Journal of Ophthalmology. 1974 ; Vol. 77, No. 1. pp. 13-18.
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