Corneal Power, Astigmatism, and Aberration Changes After LASIK
|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.
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|