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Corneal Asphericity Adjustment (Q Adjustment) in Myopic and Hyperopic Patients Undergoing Refractive Correction With Excimer Laser

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ClinicalTrials.gov Identifier: NCT01296867
Recruitment Status : Completed
First Posted : February 16, 2011
Last Update Posted : February 16, 2011
Sponsor:
Information provided by:
Democritus University of Thrace

Brief Summary:
To study the postoperative results in myopic and hyperopic eyes treated with two different laser ablation algorithms (STD and F-CAT), both FDA approved.

Condition or disease
Myopia Hyperopia

Study Type : Observational
Actual Enrollment : 36 participants
Observational Model: Cohort
Time Perspective: Prospective
Study Start Date : March 2006
Actual Primary Completion Date : March 2009
Actual Study Completion Date : May 2009




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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Forty eight myopic (24 patients) and 24 hyperopic eyes (12 patients)
Criteria

Inclusion Criteria:

  • Myopic and hyperopic eyes eligible for LASIK or PRK refractive correction
  • Central corneal thickness more than 500 micrometers

Exclusion Criteria:

  • Topographies of less than 55% of successful total sampled area and eyes exhibiting asphericity variations, in either the horizontal or the vertical axis, greater than 0.2
  • Corneal scarring
  • Cataract surgery
  • Corneal ulceration
  • Topographical abnormalities

Responsible Party: Eleftherios Paschalis / PhD, Eye Institute of Thrace / Democritus University
ClinicalTrials.gov Identifier: NCT01296867     History of Changes
Other Study ID Numbers: Q-value
First Posted: February 16, 2011    Key Record Dates
Last Update Posted: February 16, 2011
Last Verified: February 2011

Keywords provided by Democritus University of Thrace:
Laser ablation algorithms
Excimer laser
Refractive correction
Corneal Asphericity Adjustment

Additional relevant MeSH terms:
Hyperopia
Refractive Errors
Eye Diseases