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Related Experiment Videos

[Trephination using an Excimer laser].

O N Serdarevic, K Hanna, A C Gribomont

    Ophtalmologie : Organe De La Societe Francaise D'Ophtalmologie
    |January 1, 1989
    PubMed
    Summary
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    The Excimer laser offers superior precision for corneal trephination compared to mechanical methods. This advanced technique does not negatively impact wound healing in penetrating keratoplasty.

    Area of Science:

    • Ophthalmology
    • Biomedical Engineering
    • Surgical Technology

    Background:

    • Mechanical trephination for corneal transplantation can lead to tissue distortion and imprecise cuts.
    • Excimer laser technology offers potential for non-contact, high-precision tissue ablation.

    Purpose of the Study:

    • To compare the histological and ultrastructural outcomes of mechanical versus Excimer laser trephination for corneal grafts.
    • To evaluate the impact of laser trephination on wound healing following penetrating keratoplasty in an animal model.

    Main Methods:

    • Histological and ultrastructural analysis of donor buttons and recipient beds trephined mechanically and by Excimer laser (193 nm).
    • Assessment of wound healing processes in an animal model after penetrating keratoplasty using both trephination methods.

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    Main Results:

    • Excimer laser trephination demonstrated superior cutting precision and perfect centering compared to mechanical methods.
    • The non-contact nature of laser trephination eliminated pressure- or suction-induced corneal topography distortion.
    • Laser trephination did not adversely affect wound healing processes in the studied animal model.

    Conclusions:

    • Excimer laser trephination provides enhanced precision and reduces iatrogenic complications in corneal transplantation.
    • This laser-based approach is a viable alternative to mechanical trephination, preserving corneal integrity and promoting normal wound healing.