Fundus photocoagulation with the argon and krypton lasers

A comparative study

G. A. Peyman, M. Li, S. Yoneya, Morton F Goldberg, M. Raichand

Research output: Contribution to journalArticle

Abstract

Photocoagulation of the monkey fundus with an argon-krypton laser photocoagulator was performed. Lesions produced by argon and krypton wavelengths were compared at various power settings, spot sizes, and exposure durations. At low energy levels argon laser lesions appeared clinically stronger than those produced by the krypton mode. Lesions in the foveal area produced with the argon laser demonstrated more extensive microscopic damage to the inner retinal layers than did those produced with the krypton laser. Histologically, both modalities affected the outer layers of the retina. However, the krypton wavelength affected more of the choriocapillaries and the larger choroidal vessels than the argon wavelengths. Conversely, argon laser coagulation of the retinal vessels damaged the perivascular tissue in the nerve fiber layer more than the krypton laser did. Rupture of Bruch's membrane and choroidal hemorrhage occurred frequently with the krypton laser at low energy levels when a small spot size and a short coagulation time were used. Both complications were less likely to occur with argon burns at similar dosage parameters. By choosing larger spot sizes and longer coagulation times for the krypton laser, these complications were prevented.

Original languageEnglish (US)
Pages (from-to)481-490
Number of pages10
JournalOphthalmic Surgery
Volume12
Issue number7
StatePublished - 1981
Externally publishedYes

Fingerprint

Krypton
Light Coagulation
Argon
Lasers
Choroid Hemorrhage
Laser Coagulation
Bruch Membrane
Retinal Vessels
Burns
Nerve Fibers
Haplorhini
Retina
Rupture

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Peyman, G. A., Li, M., Yoneya, S., Goldberg, M. F., & Raichand, M. (1981). Fundus photocoagulation with the argon and krypton lasers: A comparative study. Ophthalmic Surgery, 12(7), 481-490.

Fundus photocoagulation with the argon and krypton lasers : A comparative study. / Peyman, G. A.; Li, M.; Yoneya, S.; Goldberg, Morton F; Raichand, M.

In: Ophthalmic Surgery, Vol. 12, No. 7, 1981, p. 481-490.

Research output: Contribution to journalArticle

Peyman, GA, Li, M, Yoneya, S, Goldberg, MF & Raichand, M 1981, 'Fundus photocoagulation with the argon and krypton lasers: A comparative study', Ophthalmic Surgery, vol. 12, no. 7, pp. 481-490.
Peyman, G. A. ; Li, M. ; Yoneya, S. ; Goldberg, Morton F ; Raichand, M. / Fundus photocoagulation with the argon and krypton lasers : A comparative study. In: Ophthalmic Surgery. 1981 ; Vol. 12, No. 7. pp. 481-490.
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