- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01988415
New Treatment Algorithm to Reduce Spherical Aberration After LASIK Correction for Myopia
January 6, 2016 updated by: Abbott Medical Optics
A Prospective Study to Evaluate the Feasibility of a New Treatment Algorithm for Wavefront-Guided Lasik Correction of Myopic Refractive Errors
The purpose of this clinical trial is to demonstrate that treatments generated by an investigational algorithm reduces spherical aberration compared to currently available iDesign treatments.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Post-LASIK induction of spherical aberration is currently among the most prominent challenges for refractive surgery.
The presence of significant spherical aberration in the visual system results in reduced contrast sensitivity, visual symptoms such as "glare" and "halos," and "night myopia" or the induction of myopia under low lighting (larger pupil size).
A modified Treatment Planning Software (TPS) "VSS-Rx1 OPM software" has been developed that uses a modified algorithm (software that designs the LASIK treatment profile) to limit the induction of postoperative spherical aberration.
Commercially available software used to calculate the LASIK treatment profile was used in one eye (active comparator [i.e., control]) and VSS-Rx1 OPM software was used in the fellow eye (experimental).
Subjects were masked to the use of either the commercially available or VSS-Rx1 OPM software.
Study Type
Interventional
Enrollment (Actual)
26
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
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Bogota Laser, Bogota, Colombia
- Gustavo Tamayo, M.D.
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (ADULT, OLDER_ADULT)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Male or female at least 18 years of age at the time of preoperative exam
- Best Spectacle Corrected Visual Acuity (BSCVA) of 20/20 or better
- Demonstration of refractive stability
- Anticipated postoperative stromal bed thickness of at least 250 microns
- Willing and able to return for all study examinations
Exclusion Criteria:
- Pregnant, breast-feeding, or intend to become pregnant over the course of the study
- Concurrent use of topical or systemic medications that may impair healing
- History of prior intraocular or corneal surgery, active ophthalmic disease, or other ocular abnormality
- Evidence of keratoconus, corneal irregularity, or abnormal topography in the operative eye(s)
- Known sensitivity or inappropriate responsiveness to any of the medications used in the postoperative course
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: NA
- Interventional Model: SINGLE_GROUP
- Masking: SINGLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
OTHER: VSS-Rx1 OPM vs Commercial iDesign Treatment
Commercially available iDesign treatment planning software used to calculate the LASIK treatment profile in one eye (active comparator [i.e., control]) and investigational software (includes a modified algorithm designed to reduce the induction of postoperative spherical aberration) in the fellow eye (experimental).
|
Commercially available iDesign treatment planning software used to calculate the LASIK treatment profile vs VSS-Rx1 OPM (includes a modified algorithm designed to reduce the induction of postoperative spherical aberration).
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean Postoperative Spherical Aberration
Time Frame: 3 months
|
Primary Efficacy Outcome Measure: mean spherical aberration of eyes treated with the VSS-Rx1 OPM treatment planning software compared to that of eyes treated with the commercial iDesign treatment planning software.
|
3 months
|
Percentage of Eyes Losing More Than 2 Lines of Best-corrected Distance Visual Acuity
Time Frame: 3 Months
|
Primary Safety Outcome Measure: percentage of eyes losing more than 2 lines of best-corrected distance visual acuity
|
3 Months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Gustavo Tamayo, M.D., Medico Oftalmologo
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
November 1, 2013
Primary Completion (ACTUAL)
July 1, 2014
Study Completion (ACTUAL)
July 1, 2014
Study Registration Dates
First Submitted
November 14, 2013
First Submitted That Met QC Criteria
November 14, 2013
First Posted (ESTIMATE)
November 20, 2013
Study Record Updates
Last Update Posted (ESTIMATE)
February 5, 2016
Last Update Submitted That Met QC Criteria
January 6, 2016
Last Verified
January 1, 2016
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- STAR-114-SARA
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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