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[Comparative krypton and argon laser trabeculoplasty].

R Makabe

    Klinische Monatsblatter Fur Augenheilkunde
    |August 1, 1986
    PubMed
    Summary
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    Argon laser trabeculoplasty significantly lowers intraocular pressure for open-angle glaucoma patients for at least 12 months. Red krypton laser trabeculoplasty offers only a short-term reduction in eye pressure.

    Area of Science:

    • Ophthalmology
    • Laser Surgery
    • Glaucoma Research

    Background:

    • Open-angle glaucoma (glaucoma chronicum simplex) is a leading cause of irreversible blindness.
    • Medical management of open-angle glaucoma can be challenging, necessitating alternative treatments.
    • Laser trabeculoplasty is an established procedure for lowering intraocular pressure.

    Purpose of the Study:

    • To compare the efficacy of red krypton laser versus blue-green and pure green argon lasers in treating medically uncontrolled open-angle glaucoma.
    • To evaluate the long-term intraocular pressure-lowering effects of different laser trabeculoplasty modalities.

    Main Methods:

    • A comparative study involving 149 eyes with open-angle glaucoma.
    • Treatment groups included red krypton laser (25 eyes), blue-green argon laser (110 eyes), and pure green argon laser (14 eyes).

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  • Intraocular pressure was monitored at 24 hours, 4 weeks, 3 months, and up to 12 months post-procedure.

    • Main Results:

    • Red krypton laser trabeculoplasty resulted in a transient intraocular pressure reduction (4.8 mm Hg at 24 hours, decreasing to 2.3 mm Hg by 4 weeks).
    • Argon laser trabeculoplasty (both blue-green and pure green) demonstrated a significantly greater and sustained intraocular pressure reduction (7.8-8.2 mm Hg) for at least 12 months.
    • No significant difference was observed between blue-green and pure green argon lasers regarding pressure reduction or outflow facility improvement.

    Conclusions:

    • Argon laser trabeculoplasty is a more effective and durable treatment for medically uncontrolled open-angle glaucoma compared to red krypton laser trabeculoplasty.
    • Both blue-green and pure green argon lasers offer comparable efficacy in managing intraocular pressure in open-angle glaucoma.
    • Laser trabeculoplasty remains a valuable therapeutic option for open-angle glaucoma management.