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Related Experiment Videos

Adjustability of refractive effect for corneal ring segments.

P A Asbell1, O O Uçakhan, D S Durrie

  • 1Mount Sinai School of Medicine, New York, NY 10029-6574, USA.

Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|December 10, 1999
PubMed
Summary

Exchanging intrastromal corneal ring segments (ICRS) safely adjusted refractive errors in four patients. This procedure improved uncorrected vision to 20/16-20/20 without compromising spectacle-corrected acuity.

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Refractive Error Correction

Background:

  • Intrastromal corneal ring segments (ICRS) are used to correct refractive errors.
  • Adjusting ICRS may be necessary to achieve optimal refractive outcomes.

Purpose of the Study:

  • To evaluate the safety and efficacy of adjusting the refractive effect of intrastromal corneal ring segments (ICRS).

Main Methods:

  • Retrospective analysis of four patients undergoing ICRS exchange during a Phase II clinical trial.
  • Evaluation of visual acuity, refraction, and topography before and after ICRS exchange.

Main Results:

  • ICRS exchange was performed due to under- or overcorrection.
  • Improved uncorrected visual acuity (20/16-20/20) was observed post-exchange.

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  • No loss of spectacle-corrected visual acuity occurred; refractive correction was stable.

    • Conclusions:

    • Exchanging ICRS thickness is a safe and effective method for correcting refractive errors.
    • This adjustment procedure can enhance visual acuity without complications.