Laser showdown: which LASIK flap maker is better?

NCT ID NCT01252654

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

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Status unknown
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First seen Jun 27, 2026 ยท Last updated Jun 27, 2026

Summary

This study compared two types of lasers used to create the flap in LASIK eye surgery for nearsightedness. 120 adults each had one eye treated with the Intralase laser and the other with the Visumax laser. The goal was to see which laser caused less discomfort during surgery and led to better vision and healing afterward.

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Study facts

What this study's own registry entry says, in plain language.

Participants

120 people

The number who actually took part.

Start date

Jan 2010

Finished

Aug 2013

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Myopic patients presenting to refractive service eligible for LASIK

Ages

21 to 60 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 21 years of age or older. * Cycloplegic spherical equivalent of \>-1.00D * Refractive cylinder -4.00 D or less. * Best spectacle corrected visual acuity (BSCVA) of 6/12 or better in BOTH eyes. * Spherical or cylindrical error has progressed at -0.50D or less per year from date of baseline measurement. * Contact lens wearers must have removed contact lenses at least two (2) weeks before the baseline measurement. * No evidence of irregular astigmatism on corneal topography. * Available to attend post-operative examinations for a 3 month period. Exclusion Criteria: * Progressive or unstable myopia and/or astigmatism. * Clinical or corneal topographic evidence of keratoconus. * Residual, recurrent or active ocular disease such as uveitis, severe dry eyes, severe allergic eye disease, glaucoma, visually significant cataract and retinal disease. * Previous corneal surgery or trauma within the corneal flap zone. * Patent corneal vascularization within 1mm of the corneal flap zone. * Taking systemic medications likely to affect wound healing, such as corticosteroids and antimetabolites. * Systemically immunocompromised. * Systemic disease likely to affect wound healing, such as diabetes, connective tissue disease and severe atopy. * Pregnant or nursing.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Singapore National Eye Centre

    Singapore, 168751, Singapore

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