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Sponsored by: |
Tabriz University |
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Information provided by: | Tabriz University |
ClinicalTrials.gov Identifier: | NCT00663923 |
The purpose of this study is to determine whether cross-cylinder approach is more effective than routine method in laser correction of astigmatism.
Condition | Intervention | Phase |
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Astigmatism |
Procedure: photorefractive keratectomy (PRK) |
Phase II |
Study Type: | Interventional |
Study Design: | Treatment, Randomized, Single Blind (Subject), Active Control, Parallel Assignment, Safety/Efficacy Study |
Official Title: | Comparison of Cross-Cylinder Approach and Routine Method for Laser Correction of Astigmatism: A Randomized Clinical Study |
Estimated Enrollment: | 50 |
Study Start Date: | November 2007 |
Estimated Study Completion Date: | November 2008 |
Estimated Primary Completion Date: | September 2008 (Final data collection date for primary outcome measure) |
Arms | Assigned Interventions |
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1: Experimental
Taking laser (PRK): by cross-cylinder approach
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Procedure: photorefractive keratectomy (PRK)
comparison of PRK by cross-cylinder approach in one eye and PRK by monotoric (routine) method in the other eye for laser correction of astigmatism
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2: Active Comparator
taking laser (PRK): by routine method
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Procedure: photorefractive keratectomy (PRK)
comparison of PRK by cross-cylinder approach in one eye and PRK by monotoric (routine) method in the other eye for laser correction of astigmatism
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All patients with eligible criteria and candidate for correction of astigmatism by excimer laser,will be treated using photorefractive keratectomy (PRK) technique. The right or left eye of every patient would be allocated randomly to one of the study methods. In spite of recent advances in excimer laser machines and surgical techniques,correction of astigmatism is not more successful compared to myopia. In this study we will compare the results of two methods of laser correction of astigmatism regarding to visual acuity,residual and regressed error and aberrations.
Ages Eligible for Study: | 20 Years to 55 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
Exclusion Criteria:
Contact: Mohammad R Sedghipour, MD | 98-41-1330-6619 | sedghipm@yahoo.com |
Iran, Islamic Republic of, East Azarbaijan | |
Nikookari hospital | Recruiting |
Tabriz, East Azarbaijan, Iran, Islamic Republic of, 5154645395 | |
Contact: Mohammad R Sedghipour, MD 98-91-4115-9811 sedghipm@yahoo.com | |
Principal Investigator: Mohammad R Sedghipour, MD |
Study Director: | Mohammad R Sedghipoor, MD | Ophthalmology Department, Tabriz University of medical Sciences |
Responsible Party: | Tabriz University of medical sciences ( Dr.Javadzadeh ) |
Study ID Numbers: | 86-43 |
Study First Received: | April 18, 2008 |
Last Updated: | April 21, 2008 |
ClinicalTrials.gov Identifier: | NCT00663923 |
Health Authority: | Iran: Ethics Committee |
Excimer Laser photorefractive keratectomy astigmatism |
Eye Diseases Refractive Errors Astigmatism |