Semiconductor Laser Endophotocoagulation of the Retina

doi:10.1001/archopht.1987.01060030144046

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Vol. 105 No. 3, March 1987

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Semiconductor Laser Endophotocoagulation of the Retina

Carmen A. Puliafito, MD; Thomas F. Deutsch, PhD; James Boll, MEng; King To, MD
From the Laser Research Laboratory, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School (Drs Puliafito and To) and the Wellman Laboratory, Massachusetts General Hospital (Drs Puliafito and Deutsch and Mr Boll), Boston.

Arch Ophthalmol. 1987;105(3):424-427.

Abstract

• Laser endophotocoagulation is an important techniquein vitreoretinal surgery. We performed successful retinal endophotocoagulationin the eyes of Dutch-belted rabbits, using high-power phased-arraysemiconductor lasers, emitting at 808 and 817 nm. The laseritself measured 25 x 30 x 21 mm, was air cooled, and was portable.At a treatment power of 100 mW, uniformly white photocoagulationlesions were seen at exposure durations of 0.2 to 1.0 s. Lesionswere similar in appearance to argon laser photocoagulation lesions,as determined by ophthalmoscopy and fluorescein angiography.Thin-section histologic examination of acute lesions revealedinjury localized to the outer retina; chorioretinal scar formationwas noted ten days after photocoagulation. To our knowledge,this study is the first in which therapeutically useful lesionswere produced using a diode laser and demonstrates the feasibilityof using these highly efficient and compact laser sources forophthalmic photocoagulation.

Footnotes

Accepted for publication Sept 18, 1986.

Reprint requests to Laser Research Laboratory, MassachusettsEye and Ear Infirmary, 243 Charles St, Boston, MA 02114 (DrPuliafito).

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