Corneal Power, Astigmatism, and Aberration Changes After LASIK
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|ClinicalTrials.gov Identifier: NCT01893671|
Recruitment Status : Completed
First Posted : July 9, 2013
Last Update Posted : April 5, 2018
|Condition or disease|
|Measurements of Patients Using OCT Before and After LASIK|
|Study Type :||Observational|
|Actual Enrollment :||22 participants|
|Official Title:||Observational Study of Corneal Power, Astigmatism, and Aberration Changes After LASIK|
|Study Start Date :||January 2011|
|Actual Primary Completion Date :||August 31, 2017|
|Actual Study Completion Date :||August 31, 2017|
Subjects undergoing routine LASIK for the correction of myopia or hyperopia.
- OCT measurement of corneal power and astigmatism vs Placido-ring [ Time Frame: 5 year ]primary goal of the study is to determine if OCT measurement of corneal power and astigmatism is more accurate than conventional Placido-ring corneal topography
- An evaluation of OCT-based epithelial thickness mapping [ Time Frame: 5 year ]The postoperative epithelial thickness variation will be used to calculate refractive effects and calibrate the smoothing parameter in the mathematical model relating corneal mean curvature and epithelial thickness.
- OCT measurements repeatability [ Time Frame: 5 year ]An assessment of the repeatability of OCT measurements
- The Development of a method of estimating the focusing power, astigmatism, and HOA of the crystalline lens [ Time Frame: 5 year ]The Development of a method of estimating the focusing power, astigmatism, and HOA of the crystalline lens based on measurements of the lens' anterior and posterior capsular topographies and positions with the ultrahigh-speed MIT OCT prototype.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01893671
|United States, Oregon|
|Oregon Health & Science University|
|Portland, Oregon, United States, 97239|
|Principal Investigator:||David Huang, MD, PhD||Oregon Health & Science Universtiy|