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Sponsored by: |
Medical College of Georgia |
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Information provided by: | Medical College of Georgia |
ClinicalTrials.gov Identifier: | NCT00598689 |
GenTeal gel is an artifical tear gel used to lubricate the surface of the eye. This study will evaluate the effect of GenTeal gel on comfort following LASIK surgery. Participants will be asked to come to the clinic for three regularly scheduled visits after LASIK surgery: Day 1 (one day after LASIK surgery), Day 7 (one week follow-up), and Day 30 (one month follow-up). Participants will be asked to complete a questionnaire regarding eye comfort during each follow up visit. Participants will be randomly assigned to one of two groups, one of which will receive Genteal Gel four times a day for five days prior to surgery. The other group will receive no preoperative gel or lubricant, which has been our standard approach for many years.
Condition | Intervention | Phase |
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Refractive Surgical Procedures |
Drug: 0.3% hypromellose Other: No Artificial Tears |
Phase IV |
Study Type: | Interventional |
Study Design: | Treatment, Randomized, Single Blind (Investigator), Parallel Assignment, Efficacy Study |
Official Title: | Efficacy, Tolerability and Comfort of GenTeal and GenTeal Gel, (0.3% Hypromellose) in the Pre- and Post- Operative Treatment of Patients Undergoing LASIK Surgery |
Estimated Enrollment: | 80 |
Study Start Date: | February 2008 |
Estimated Study Completion Date: | July 2008 |
Estimated Primary Completion Date: | June 2008 (Final data collection date for primary outcome measure) |
Arms | Assigned Interventions |
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1: Experimental
Genteal gel four times a day for 5 days prior to LASIK surgery
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Drug: 0.3% hypromellose
0.3% hypromellose four times a day for 5 days prior to LASIK surgery
Drug: 0.3% hypromellose
0.3% hypromellose drops 4 times a day after LASIK surgery
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2: No Intervention
No Genteal Gel prior to LASIK surgery
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Other: No Artificial Tears
No artificial tears prior to LASIK surgery
Drug: 0.3% hypromellose
0.3% hypromellose drops 4 times a day after LASIK surgery
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LASIK (Laser Keratomielusis in Situ) is a frequently performed procedure to reduce the refractive error of the eye so as to minimize the subsequent need for eyeglasses or contact lenses. The procedure requires the creation of a superficial corneal flap, usually with an instrument known as a microkeratome. During the creation of the flap with a microkeratome, the corneal epithelium is typically subjected to sliding stresses which occasionally cause disruption of the epithelial surface, a complication with potentially serious adverse effect on the post operative visual acuity. As well, shortly before the creation of the flap, the patient is often dilated and invariably treated with topical anesthetics. These agents, and their preservatives, can have a negative effect on corneal epithelial integrity, right before the epithelium must withstand the passage of the microkeratome. Therefore, it is imperative that the epithelium be in the best possible condition prior to the LASIK procedure. For this reason, ocular lubricants may be used for a period of time prior to surgery in order to maximize epithelial health.
In the immediate post-operative period the bond between the newly created flap and the underlying corneal stroma is weak, and the epithelium has just been subjected to the pharmacologic and mechanical stresses noted above. It is imperative that the surface continuity of the epithelium between the edge of the flap and the surrounding surface be restored as rapidly as possible, as reestablishment of an intact epithelial surface minimizes the risks of flap shift, epithelial ingrowth, and infection. For all these reasons, it is a generally accepted standard of care to use aggressive ocular lubrication during the post-operative period in order to maximize the speed of epithelial recovery.
GenTeal Lubricant Eye Drops and GenTeal Gel, (0.3% hypromellose, Norvatis Ophthalmics, Basel, Switzerland) provide a natural alternative to preservative-free treatments, with a sodium perborate preservative system and long-lasting action due to the carbomer gelling agent. The perborate preservative, which breaks down to water and oxygen on the ocular surface, essentially delivers a preservative-free lubricant to the eye. This makes the GenTeal products attractive agents for use in the LASIK perioperative period.
Ages Eligible for Study: | 18 Years to 60 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
Exclusion Criteria:
Contact: David D Bogorad, M.D. | 7067211148 | dbogorad@mcg.edu |
Contact: Tracie Sponseller, O.D. | 7066511291 | tsponseller@mcg.edu |
United States, Georgia | |
EyeCare One | |
Augusta, Georgia, United States, 30907 |
Principal Investigator: | David D Bogorad, M.D | Medical College of Georgia |
Responsible Party: | Medical College of Georgia ( David D. Bogorad, MD; Associate Professor ) |
Study ID Numbers: | 07-09-052 |
Study First Received: | January 10, 2008 |
Last Updated: | August 8, 2008 |
ClinicalTrials.gov Identifier: | NCT00598689 |
Health Authority: | United States: Institutional Review Board |
LASIK Ocular Lubricants Corneal Epithelium Wound Healing |