Assessment of the Efficacy of Ocular Dipyridamole in the Treatment of Dry Eye Symptomology in Subjects With Pterygium

May 24, 2016 updated by: Lily Karmona, Ariel University
Subjects with pterygium and associated dry eye symptoms (DES) are randomized into an active cohort (receiving ocular administration of Dipyridamole) or placebo cohort (ocular administration of vehicle). Monthly follow up is conducted for 12 months. Testing conducted at follow up will assess dry eye / pterygium symptoms and endpoints and review the efficacy of the intervention.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Unknown

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
40

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Able to provide informed consent.
  • Ineligible or refused surgical excision, or had recurrence of pterygium following surgical excision
  • Able to follow the study instructions, including application of the study product
  • Agreement not to change the type of lubricating eye drops used (if any) during their participation in the study.
  • Assessed as having at least pterygium stage 0-1 (pinguecula) based on Johnston, Williams & Sheppard's classification for pterygium
  • Concomitant dry eye symptoms, as determined by one or more of the following Subject interview (modified Ocular Surface Disease Index test), Tearing, Itch / foreign body sensation, Positive Fluorescein test, Positive TBUT test, Positive Tear meniscus test

Exclusion Criteria:

  • Inability to provide informed consent
  • Dry eye due to other factors
  • Known lacrimal obstruction
  • Contact lens wearers
  • Non-corrected refraction
  • Allergy or sensitivity to dipyridamole or excipients
  • Use of dipyridamole in the last 6 months
  • Other eye conditions (i.e. active ocular infection, herpes keratitis in last 6 months, corneal disorder abnormality excluding pterygium, history of ocular acne rosacea, blepharitis) which would impact results
  • Diagnosis of ALS (Amyotrophic lateral sclerosis)
  • Existing conditions which are contraindicated or precaution in use of dipyridamole or excipients
  • Use of eye drops (other than ocular lubricants)
  • Pregnant or breastfeeding
  • Inability to apply the medical product or follow the study procedures
  • Anything that the PI thinks would impact the trial

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Active

Dipyridamole eye drops 8.48 mg in 100ml

1 drop three times a day for 1 year
Drug: Dipyridamole
Placebo Comparator: Placebo

Fluorescein in Active Vehicle

1 drop three times a day for 1 year
Drug: Placebo

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Assess the changes in dry eye parameters via a change in tear secretion rate
Time Frame: 6 months

Change in the tear secretion rate will be defined by successful change in parameters of ONE of the following testing methods compared to baseline:

  1. Fluorescein - Improvement of one of the quadrants sufficient to change the severity rating
  2. TBUT (Tear Breakup time) - Decreased by at least 1 second
  3. Tear meniscus test - Increase of at least 0.2mm
6 months
Assess the changes in dry eye parameters via reduction in dry eye symptomology.
Time Frame: 6 months

Reduction in dry eye symptomology will be defined as ONE of the following relative to baseline, determined by subject feedback

  • An improvement in questionnaire scores
  • Specified improvement in blurred vision grading
  • Specified improvement in tearing grading
  • Specified improvement in itch / foreign body (grittiness) sensation grading.
6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
A minimum significant reversion of pterygia relative to baseline or cessation of growth of pterygium
Time Frame: 12 months
Minimum significant reversion will be defined as a decrease in vascularisation, or a measurable decrease from baseline of OCT (Ocular Coherence Tomography) measured parameters (height or width).
12 months

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Ariel University

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 1, 2016

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 1, 2017

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 1, 2018

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 10, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 24, 2016

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 25, 2016

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 25, 2016

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 24, 2016

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2016

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 0064-16-WOMC

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

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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