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Related Experiment Videos

Excimer laser in situ keratomileusis

F B Kremer1, M Dufek

  • 1Kremer Laser Eye Center, Radnor, Pa 19087, USA.

Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|May 1, 1995
PubMed
Summary
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This study shows that using a 193-nm excimer laser for corneal stromal ablation with a hinged flap effectively reduces refractive error. The procedure resulted in minimal complications and improved visual acuity for most patients.

Area of Science:

  • Ophthalmology
  • Laser Surgery
  • Refractive Error Correction

Background:

  • Refractive errors like myopia are common.
  • Surgical interventions aim to correct vision.
  • Excimer laser technology offers precise tissue ablation.

Purpose of the Study:

  • To evaluate the efficacy and safety of 193-nm excimer laser stromal ablation with a hinged corneal flap.
  • To assess refractive outcomes and visual acuity following the procedure.
  • To compare this method with excimer laser surface ablation.

Main Methods:

  • A retrospective review of 31 eyes undergoing corneal stromal ablation with a hinged flap using a 193-nm excimer laser.
  • Preoperative and 6-month postoperative refractive error (spherical equivalent and astigmatism) measurements were analyzed.

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  • Visual acuity and complication rates were recorded.

    • Main Results:

    • Mean preoperative spherical equivalent refraction was -6.25 D, improving to -0.50 D at 6 months.
    • 74.2% of eyes achieved correction within 1.00 D of the intended outcome.
    • 81% of eyes had uncorrected visual acuity of 20/40 or better, with minimal complications.

    Conclusions:

    • Excimer laser ablation of the corneal stromal bed combined with a hinged corneal flap is an effective method for refractive error correction.
    • This technique demonstrates a favorable safety profile with a low incidence of complications.
    • The procedure offers advantages over excimer laser surface ablation, potentially leading to better outcomes and fewer adverse events.