The Visual Effect of an Investigational Artificial Tear in the Tear Layer. - Full Text View

Purpose

The purpose of this study is to investigate how the addition of a new artificial tear product when applied to the tear layer affects contrast sensitivity and optical aberrations over time. We will also determine if there are any adverse effects associated with drop instillation.

Condition	Intervention
Dry Eye Disease	Drug: Optiva artificial tear by Allergan

MedlinePlus related topics:

Eye Diseases

U.S. FDA Resources

Study Type:	Interventional
Study Design:	Supportive Care, Non-Randomized, Single Blind, Active Control, Single Group Assignment, Safety/Efficacy Study

Official Title:	The Visual Effect of an Investigational Artificial Tear in the Tear Layer.

Further study details as provided by Southern California College of Optometry:

Primary Outcome Measures:

Contrast sensitivity and optical aberrations before daily artificial tear use and at 1 and 2 weeks after daily use
Dry eye questionnaire before and at 1 and 2 weeks after artificial tear use
Slit lamp exam before and at 1 and 2 weeks after artificial tear use

Estimated Enrollment:	30
Study Start Date:	September 2005
Study Completion Date:	September 2007

Detailed Description:

Artificial tears are applied to the eye to treat a variety of eye conditions. These conditions typically are associated with dry eyes and include tear film deficiency due to ocular or systemic disease, lid resurfacing problems, and contact lens wear. The artificial tears are used to alleviate the dry eye symptoms. The administration of an artificial tear to the eye can disrupt the tear layer and this disruption could then result in a decrease in contrast sensitivity.1 - 6

Temporal changes in tear film structure (e.g., drying of the tear layer) can distort the optical wavefront as it passes through the tear layer and subsequently reduce contrast sensitivity.1 Theoretically, any substance applied to the tear layer that alters its structure could affect contrast sensitivity. Previous work in our lab has demonstrated that Refresh Liquigel when applied to the tear layer of non-contact and contact lens wearing subjects can decrease contrast sensitivity.4, 5, 7 In this study, we propose to examine the effects of a new investigational artificial tear on contrast sensitivity and optical aberrations for up to 30 minutes after administration into the tear layer of normal and dry eye subjects. A questionnaire will also be used to determine the opinions of the subjects concerning this new artificial tear.

Eligibility

Ages Eligible for Study:	18 Years to 40 Years
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	Yes

Criteria

Inclusion Criteria:

Thirty subjects free from ocular pathology will be chosen. Ten of the subjects will have a normal tear layer, ten will have a mild dry eye, and ten will have a moderate/severe dry eye. All subjects will be over the age of 18. Best corrected visual acuities will be at least 20/25 on a standard Snellen acuity chart at distance.

Exclusion Criteria:

Subjects will be excluded from this project if they have, or during the course of the experiment they develop, an allergy to the eye drops used in this project.

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00395759

Locations


United States, California
	Southern California College of Optometry
	Fullerton, California, United States, 92831

Sponsors and Collaborators

Southern California College of Optometry

Allergan

Investigators


Principal Investigator:	William Ridder, OD. PhD	Southern California College of Optometry

More Information

Publications:

Thai LC, Tomlinson A, Ridder WH. Contact lens drying and visual performance: the vision cycle with contact lenses. Optom Vis Sci. 2002 Jun;79(6):381-8.

Study ID Numbers:	SCCO2-2233
First Received:	November 2, 2006
Last Updated:	October 21, 2007
ClinicalTrials.gov Identifier:	NCT00395759
Health Authority:	United States: Institutional Review Board

Keywords provided by Southern California College of Optometry:

contrast sensitivity

Study placed in the following topic categories:

Lacerations

Eye Diseases

ClinicalTrials.gov processed this record on September 23, 2008

Sponsors and Collaborators:	Southern California College of Optometry Allergan
Information provided by:	Southern California College of Optometry
ClinicalTrials.gov Identifier:	NCT00395759