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Related Experiment Videos

Purse-string sutures for hyperopia following radial keratotomy

R E Damiano1, S L Forstot, C J Frank

  • 1Corneal Consultants of Colorado, P.C., Littleton, USA.

Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|August 12, 1998
PubMed
Summary

Double intrastromal purse-string sutures effectively correct hyperopic shift after radial keratotomy, improving uncorrected vision and reducing refractive errors. This surgical technique offers a viable solution for patients seeking better visual outcomes post-RK.

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Refractive Surgery

Background:

  • Previous study presented 19 procedures using intrastromal purse-string sutures for hyperopic shift post-radial keratotomy (RK).
  • This study details outcomes for 34 additional procedures with extended follow-up to assess long-term efficacy in rehabilitating eyes.

Purpose of the Study:

  • To evaluate the effectiveness of double intrastromal purse-string suturing in correcting hyperopic shift and improving vision in patients with prior radial keratotomy.
  • To assess the refractive outcomes and visual acuity changes following this surgical intervention.

Main Methods:

  • Fifty-three eyes of 53 RK patients underwent double corneal intrastromal purse-string suturing.
  • Patients were followed for at least 1 year, with pre- and post-operative refractive error and visual acuity measurements recorded.

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  • Included eyes had primary overcorrection or progressive hyperopic shift, with initial spherical equivalents ranging from +0.50 to +6.25 D.

    • Main Results:

    • Average follow-up was 3.6 years (range, 1-10 years).
    • Average keratometric power steepened by 2.94 D, and spherical equivalent refraction averaged -0.15 D post-suturing.
    • Uncorrected visual acuity was 20/40 or better in 72% of eyes; 78% had refractive astigmatism of +/- 2.00 D or less.
    • Fifteen eyes gained two or more lines of best spectacle-corrected visual acuity, with no eyes losing lines.

    Conclusions:

    • Double intrastromal purse-string suturing effectively steepens the central cornea.
    • This procedure successfully reduces hyperopia in eyes that have undergone radial keratotomy.
    • The technique provides a safe and effective method for visual rehabilitation in this patient population.