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Photorefractive Keratectomy (PRK) for Hyperopia After Radial Keratotomy

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: June 10, 2009
Last Update Posted: June 10, 2009
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
University of Sao Paulo
To assess the efficacy, predictability, stability and safety of corneal wavefront-guided photorefractive keratectomy (PRK) for correcting hyperopia and astigmatism after radial keratotomy (RK).

Condition Intervention
Hyperopia Procedure: Photorefractive keratectomy

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Corneal Wavefront-Guided PRK With Adjunctive Mitomycin-C for the Treatment of Hyperopia After Radial Keratotomy

Further study details as provided by University of Sao Paulo:

Enrollment: 36
Study Start Date: February 2008
Study Completion Date: June 2009
Primary Completion Date: June 2009 (Final data collection date for primary outcome measure)

Information from the National Library of Medicine

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Ages Eligible for Study:   30 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

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
  Contacts and Locations
No Contacts or Locations Provided
  More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Prof. Newton Kara-José, MD, University of Sao Paulo
ClinicalTrials.gov Identifier: NCT00917657     History of Changes
Other Study ID Numbers: 1183/07
First Submitted: June 9, 2009
First Posted: June 10, 2009
Last Update Posted: June 10, 2009
Last Verified: June 2009

Keywords provided by University of Sao Paulo:
photorefractive keratectomy
radial keratotomy
refractive surgery

Additional relevant MeSH terms:
Refractive Errors
Eye Diseases