Corneal Power, Astigmatism, and Aberration Changes After LASIK
|ClinicalTrials.gov Identifier: NCT01893671|
Recruitment Status : Unknown
Verified April 2015 by David Huang, Oregon Health and Science University.
Recruitment status was: Recruiting
First Posted : July 9, 2013
Last Update Posted : April 23, 2015
|Condition or disease|
|Measurements of Patients Using OCT Before and After LASIK|
|Study Type :||Observational|
|Estimated Enrollment :||50 participants|
|Official Title:||Observational Study of Corneal Power, Astigmatism, and Aberration Changes After LASIK|
|Study Start Date :||January 2011|
|Estimated Primary Completion Date :||June 2016|
|Estimated Study Completion Date :||June 2016|
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
|Contact: Janice Ladwig, COTemail@example.com|
|Contact: Denny Romfhfirstname.lastname@example.org|
|United States, Oregon|
|Oregon Health & Science University||Recruiting|
|Portland, Oregon, United States, 97239|
|Contact: Janice Ladwig 503-494-8024 email@example.com|
|Sub-Investigator: David Huang, MD, PhD|
|Sub-Investigator: Winston Chamberlain, MD, PhD|
|Sub-Investigator: Lorinna Lombardi, MD|
|Principal Investigator:||David Huang, MD, PhD||Oregon Health & Science Universtiy|