Photorefractive Keratectomy (PRK) for Hyperopia After Radial Keratotomy


To assess the efficacy, predictability, stability and safety of corneal wavefront-guided photorefractive keratectomy (PRK) for correcting hyperopia and astigmatism after radial keratotomy (RK).

Full Title of Study: “Corneal Wavefront-Guided PRK With Adjunctive Mitomycin-C for the Treatment of Hyperopia After Radial Keratotomy”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: N/A
    • Intervention Model: Single Group Assignment
    • Primary Purpose: Treatment
    • Masking: None (Open Label)
  • Study Primary Completion Date: June 2009


  • Procedure: Photorefractive keratectomy

Participating in This Clinical Trial

Inclusion Criteria

  • Hyperopia or hyperopic astigmatism with spherical equivalent of up to + 9,25 D and astigmatism of up to – 4,5 D;
  • Uncorrected Visual Acuity of 20/40 or worse;
  • Best-Corrected Visual Acuity of 20/60 or better.

Exclusion Criteria

  • Systemic or ocular conditions that could bias results
  • Previous photorefractive surgery

Gender Eligibility: All

Minimum Age: 30 Years

Maximum Age: 70 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • University of Sao Paulo
  • Provider of Information About this Clinical Study
    • Prof. Newton Kara-José, MD, University of Sao Paulo

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