This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

IntraLase vs Hansatome Flaps in LASIK

This study has been completed.
Information provided by:
Stanford University Identifier:
First received: June 3, 2008
Last updated: June 1, 2011
Last verified: June 2008
This study compared the clinical outcomes between fellow eyes randomized to either IntraLase femtosecond laser-created flaps or Hansatome mechanical keratome-created flaps during wavefront-guided laser in situ keratomileusis.

Condition Intervention
Myopia Device: LASIK

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Comparison of the IntraLaser Femtosecond Laser and Hansatome Mechanical Keratome for Laser In Situ Keratomileusis

Further study details as provided by Stanford University:

Primary Outcome Measures:
  • Visual acuity

Secondary Outcome Measures:
  • Contrast sensitivity

Estimated Enrollment: 51
Study Start Date: May 2004
Estimated Study Completion Date: November 2005

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

Inclusion criteria were "T 6.00 D of spherical myopia, "T 3.00 D of refractive astigmatism, stable refraction (less than 0.50D per year of sphere or cylinder), corneal diameter less than 11.0 mm to allow for suction fixation ring, soft contact wearer with discontinuation of wear at least 7 days prior to preoperative evaluation, visual acuity correctable to at least 20/20 in both eyes, more than 21 years of age, ability to participate in follow-up examinations for 12 months after LASIK surgery. In order to fairly compare the visual outcomes of the two keratomes, patients were required to have closely matched eyes, in terms of refractive error. Exclusion Criteria:Exclusion criteria include rigid gas permeable contact lens wearer, severe dry eyes, severe blepharitis, anterior segment pathology (cataracts or corneal scarring or neovascularization within 1 mm of intended ablation zone), recurrent corneal erosion, severe basement membrane disease, progressive or unstable myopia or keratoconus, unstable corneal mires on central keratometry, corneal thickness in which LASIK procedure would result in less than 250 micros or remaining posterior corneal thickness below the flap postoperatively, baseline standard manifest refraction > 0.75 D more minus in sphere power, or a difference of greater than 0.50D in cylinder power compared to baseline standard cycloplegic refraction, two eyes for which the baseline standard cycloplegic refraction differ from each other more than 0.75 in sphere, 0.50 D in cylinder, or have a different type of astigmatism (i.e. with-the-rule) when the cylinder is > 0.50D, or preoperative assessment of ocular topography and/or aberrations indicates that either eye is not suitable candidate for LASIK vision correction procedure (ie forme fruste keratoconus, corneal warpage, or pellucid marginal degeneration), previous intraocular or corneal surgery, and history of herpes zoster or simplex keratitis, patients on systemic corticosteroid or immunosuppressive therapy, immunocompromised subjects or clinically significant atopic disease, connective tissue disease, or diabetes, steroid responder, macular pathology, pregnant or lactating patients, patients with sensitivity to planned study concomitant medications or patients participating in another ophthalmic drug or device clinical trial.

  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00691431

United States, California
Stanford University School of Medicine
Stanford, California, United States, 94305
Sponsors and Collaborators
Stanford University
Principal Investigator: Edward E. Manche Stanford University
  More Information

Responsible Party: Edward E. Manche, Principal Investigator, Stanford University School of Medicine Identifier: NCT00691431     History of Changes
Other Study ID Numbers: SU-05302008-1190
Study First Received: June 3, 2008
Last Updated: June 1, 2011 processed this record on September 21, 2017