Laser showdown: which LASIK flap maker is better?
NCT ID NCT01252654
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
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120 people
The number who actually took part.
- Start date
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Jan 2010
- Finished
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Aug 2013
- Lead sponsor
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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
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21 to 60 years
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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
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Singapore National Eye Centre
Singapore, 168751, Singapore
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Other studies related to the condition(s) this trial covers.
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