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Related Experiment Videos

High precision subsurface photodisruption in human sclera.

Zachary S Sacks1, Ron M Kurtz, Tibor Juhasz

  • 1University of Michigan, Center for Ultrafast Science Ann Arbor, Michigan 48109-2099, USA.

Journal of Biomedical Optics
|August 15, 2002
PubMed
Summary

Femtosecond laser pulses precisely create subsurface incisions in the sclera, a key step for potential glaucoma and presbyopia surgeries. This innovative technique shows promise for new ophthalmic surgical procedures.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Laser Surgery

Background:

  • Femtosecond laser pulses enable precise subsurface photodisruption in transparent tissues like the cornea.
  • This study explores the feasibility of using femtosecond laser technology for subsurface photodisruption in the translucent sclera.

Purpose of the Study:

  • To demonstrate the proof of concept for high-precision subsurface photodisruption in the sclera using femtosecond laser technology.
  • To investigate the potential of this technique for novel surgical treatments of glaucoma and presbyopia.

Main Methods:

  • Microjoule femtosecond pulses (1060 nm and 775 nm) were used to create subsurface incisions in human sclera ex vivo.
  • Scleral tissue was dehydrated to enhance translucency, and the laser beam was focused to small spot sizes (1.5 or 5 micrometers).

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  • Incisions were made at various depths below the tissue surface, creating different intrascleral patterns.

    • Main Results:

    • Successful photodisruption was achieved on the sclera's backsurface without damaging overlying tissues.
    • Various intrascleral incisions were created, including transcleral channels and grooves suitable for scleral implants.

    Conclusions:

    • High-precision, subsurface scleral photodisruption is achievable in vitro using femtosecond laser technology.
    • Further in vivo research is necessary to validate the surgical applicability of this technique for ophthalmic conditions.