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

A Combined Retrospective and Prospective Chart Review Analysis of Visual Outcomes Following Excimer Laser Vision Correction

Status

UNKNOWN

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT00778570

Enrollment

4000

Registered

2008-10-23

Start date

2007-02-28

Completion date

2020-12-31

Last updated

2014-12-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Astigmatism, Farsightedness, Nearsightedness

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.

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.

Interventions

None listed

Eligibility

Sex/Gender

ALL

Healthy volunteers

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

Design outcomes

Primary

Measure	Time frame
Visual Acuity	1 day, 1W, 1M, 3M, 6M, 9M, 12M

Countries

Canada

Contacts

Primary ContactGeorge Mintsioulis, MD

gmintsioulis@ottawahospital.on.ca613-737-8926

Backup ContactW.Bruce Jackson, MD

bjackson@ohri.ca613-737-8759

Outcome results