Two Phase Clinical Study of the Impact of Contact Lenses and Solutions on Corneal Structure

December 20, 2017 updated by: Christine Sindt
Assess the usefulness of using confocal microscopy to examine changes to the structure of the cornea and to identify any potential consequences of contact lens wear and/or solution use.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Several types of solutions are used in contact lens wear.

Each contact lens solution used to disinfect contacts have different ingredients even though they all disinfect the contacts.

The objective of this study is to examine the layers of the cornea via HRT in order to assess the usefulness of this technology and to identify any potential consequences of contact lens wear and/or care solution used.

Study Type

Interventional

Enrollment (Actual)

51

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

  • United States
    • Iowa
      • Iowa City, Iowa, United States, 52242
        • University of Iowa Contact Lens Clinic

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:

  • Vision correctable to 20/30 or better in both eyes
  • Successful soft contact lens wear for at least 2 weeks prior to enrollment

Exclusion Criteria:

  • History of hypersensitivity to any of the components in any of the lens solutions
  • One functional eye or a monofit lens
  • Any abnormal slit-lamp finding at baseline
  • Use of topical ocular meds
  • Any systemic condition with significant ocular side effects or that interfere with contact lens wear
  • Enrollment of the investigator's office staff, relatives or members of their respective households
  • Enrollment of more than one member of the same household

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: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Placebo 1
Subjects that have never worn contacts with no ocular problems were selected. A baseline HRT was performed. Trial contact lenses were soaked in clear care solution for 10 hours. After 10 hours of the lenses soaking in clear care the subject returned. The contacts lenses that were soaked in clear care were inserted onto the patients eyes. The patient then wore the contacts for two hours. After two hours the contact lenses were removed. An HRT was performed immediately after removing the contact lenses. The HRT scans were analyzed for dendritic cell migration, basal cell epithelial density and nerve density and tortuosity.
Drug: Clear Care
neutralized Clear Care
Other Names:
  • hydrogen peroxide disinfecting solution
Active Comparator: Renu
Subjects that had worn contacts for at least two weeks without incident were selected. A baseline HRT was performed.Trial contacts lenses were soaked in ReNu contact solution for 10 hours. After 10 hours of the lenses soaking in ReNu the subject returned. The contacts were inserted onto the patients eyes. The patient then wore the contacts for two hours. After two hours the contacts lenses were removed. An HRT both with and without sodium fluorescein was performed immediately after removing the contact lenses.The HRT scans were analyzed for dendritic cell migration, basal cell epithelial density and nerve density and tortuosity.
Drug: ReNu
overnight soak in solution
Active Comparator: Optifree
Subjects that had worn contacts for at least two weeks without incident were selected. A baseline HRT was performed.Trial contacts lenses were soaked in Optifree Replenish contact solution for 10 hours. After 10 hours of the lenses soaking in Optifree Replenish the subject returned. The contacts were inserted onto the patients eyes. The patient wore contacts the for two hours. After two hours the contacts were removed. An HRT both with and without sodium fluorescein was performed immediately after removing the contact lenses.The HRT scans were analyzed for dendritic cell migration, basal cell epithelial density and nerve density and tortuosity.
Drug: OPTI-FREE
overnight soak in solution
Other Names:
  • Replenish

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
HRT Corneal Scan
Time Frame: baseline and 2 hours
Looking for cell density
baseline and 2 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Christine Sindt

Collaborators

Alcon Research

Investigators

  • Principal Investigator: Christine W Sindt, O.D., University of Iowa

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

November 1, 2008

Primary Completion (Actual)

March 1, 2009

Study Completion (Actual)

March 1, 2009

Study Registration Dates

First Submitted

December 5, 2008

First Submitted That Met QC Criteria

December 8, 2008

First Posted (Estimate)

December 9, 2008

Study Record Updates

Last Update Posted (Actual)

January 23, 2018

Last Update Submitted That Met QC Criteria

December 20, 2017

Last Verified

December 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 200806729

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

There is no plan to share IPD.

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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