ClinicalTrials.gov
ClinicalTrials.gov Menu

Advanced Surface Ablation (ASA) vs Laser-Assisted In Situ Keratomileusis (LASIK)

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. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00778570
Recruitment Status : Recruiting
First Posted : October 23, 2008
Last Update Posted : December 2, 2014
Sponsor:
Information provided by (Responsible Party):
Ottawa Hospital Research Institute

Study Description
Go to 
Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information
Brief Summary:

The purpose of this combined retrospective and prospective chart review analysis is to investigate the safety, efficacy, and predictability obtained via Laser-Assisted In Situ Keratomileusis (LASIK) and Advanced Surface Ablation (ASA) over a wide range of refractive errors

The working hypothesis is that there will be no difference in clinical outcomes between patients treated with LASIK or ASA.


Condition or disease
Nearsightedness Farsightedness Astigmatism

Detailed Description:

Excimer laser vision correction (LVC) is a widely used procedure to correct nearsightedness, farsightedness, and astigmatism by reshaping the surface of the eye (cornea). Laser-Assisted In Situ Keratomileusis (LASIK) and Advanced Surface Ablation (ASA) and are techniques currently used to prepare the cornea for Excimer LVC.

This review is intended to study whether LASIK is equal in visual outcome (null hypothesis), more effective (alternate hypothesis 1) or less effective (alternate hypothesis 2) than ASA in clinical outcome up to one year.


Study Design
Go to 
Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Study Type : Observational
Estimated Enrollment : 4000 participants
Official Title: A Combined Retrospective and Prospective Chart Review Analysis of Visual Outcomes Following Excimer Laser Vision Correction
Study Start Date : February 2007
Estimated Primary Completion Date : December 2020
Estimated Study Completion Date : December 2020
Groups and Cohorts
Go to 
Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Group/Cohort
ASA
Participants treated for Excimer laser vision correction using Advanced Surface Ablation (ASA).
LASIK
Participants treated for Excimer laser vision correction using Laser-Assisted In Situ Keratomileusis (LASIK)


Outcome Measures
Go to 
Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Primary Outcome Measures :
  1. Visual Acuity [ Time Frame: 1 day, 1W, 1M, 3M, 6M, 9M, 12M ]

Eligibility Criteria
Go to 
Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Male and female participants from the Ottawa/Gatineau region requesting laser vision correction to correct nearsightedness, farsightedness, and/or astigmatism.
Criteria

Inclusion Criteria:

  • Eyes that were treated for LASIK or ASA Excimer laser vision correction before December 1st 2006 and newly recruited eyes that qualify for LASIK or ASA Excimer laser vision correction may be enrolled in this study.

Exclusion Criteria:

  • There are no exclusion criteria; all patients that went forward with Excimer laser vision correction may be included.
Contacts and Locations
Go to 
Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00778570


Contacts
Contact: George Mintsioulis, MD 613-737-8926 gmintsioulis@ottawahospital.on.ca
Contact: W.Bruce Jackson, MD 613-737-8759 bjackson@ohri.ca

Locations
Canada, Ontario
University of Ottawa Eye Institute Recruiting
Ottawa, Ontario, Canada, K1H 8L6
Contact: Gail Kayuk, BSc    613-737-8657    gkayuk@ottawahospital.on.ca   
Principal Investigator: George Minstioulis, MD         
Sponsors and Collaborators
Ottawa Hospital Research Institute
Investigators
Principal Investigator: George Mintsioulis, MD University of Ottawa Eye Institute
More Information
Go to 
Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Responsible Party: Ottawa Hospital Research Institute
ClinicalTrials.gov Identifier: NCT00778570     History of Changes
Other Study ID Numbers: 2006800-01H
First Posted: October 23, 2008    Key Record Dates
Last Update Posted: December 2, 2014
Last Verified: November 2014

Additional relevant MeSH terms:
Astigmatism
Myopia
Hyperopia
Refractive Errors
Eye Diseases