Surgical Correction of Astigmatism

April 30, 2014 updated by: Anders Ivarsen, Aarhus University Hospital

Comparative Study of Surgical Laser Correction of Astigmatism

Laser correction for myopia and astigmatism using an excimer laser has been performed with success for several years.

During the last 2 years, a new method for correction of refractive errors has emerged. In the method (ReLex) a femtosecond laser is used to cut a lenticule in the corneal stroma that is subsequently removed. For simple myopia this method has proved effective and on par with excimer baser LASIK. However, it remains to be determined if ReLEx is as effective in the treatment of astigmatism.

In the study, patients with high astigmatism are treated with conventional LASIK for astigmatism in one eye and with ReLEx for astigmatism in the other.

Study Overview

Status

Withdrawn

Conditions

Intervention / Treatment

Study Type

Interventional

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Aarhus, Denmark, DK-8000
        • Department of Ophthalmology, Aarhus University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years to 50 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Myopic astigmatism between -2.0 and -5.0 diopters
  • Maximal difference in spherical equivalent refraction of 2 D between eyes
  • No ocular or systemic disease
  • Not pregnant or breastfeeding
  • Minimum BSCVA of 0.8 (decimal)
  • Normal corneal topography
  • Sufficient corneal thickness to allow the treatment

Exclusion Criteria:

  • Subjects not fulfilling the above criteria

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: ReLEx
One eye is treated with ReLEx the other with LASIK
Procedure: ReLEx
Other Names:
  • Device: Carl Zeiss Meditec Visumax Femtosecond Laser
Active Comparator: LASIK
One eye is treated with ReLEx the other with LASIK
Procedure: LASIK
Other Names:
  • Device: Carl Zeiss Meditec MEL-80 excimer laser

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Visual acuity
Time Frame: 1 year
1 year

Secondary Outcome Measures

Outcome Measure
Time Frame
Refraction
Time Frame: 1 year
1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Aarhus University Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2012

Primary Completion (Anticipated)

September 1, 2012

Study Registration Dates

First Submitted

September 4, 2012

First Submitted That Met QC Criteria

September 6, 2012

First Posted (Estimate)

September 7, 2012

Study Record Updates

Last Update Posted (Estimate)

May 2, 2014

Last Update Submitted That Met QC Criteria

April 30, 2014

Last Verified

April 1, 2014

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • AUH_ASTIGMATISM

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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