Evaluating Color Perception Under LED Red/Green and Green Dominant Light

May 13, 2019 updated by: University of Colorado, Denver
The investigators are testing a Light-emitting Diode (LED) flashlight from First-Light™ USA called the Tomahawk MC Tactical Light to determine the range of colors people are able to see with these flashlights at night. The flashlight has been designed to reduce visibility of the user and uses a combination of green and red LED lamps to achieve this. In this study investigators wish to determine how well a subject can differentiate colors at night in a quantifiable manner. Investigators will use the Farnsworth Munsell 100 hue test which requires the user to put shades of red, green, blue and yellow into progressive color order which is scored according to the manufactures specifications.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

39

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
    • Colorado
      • Aurora, Colorado, United States, 80045
        • University of Colorado Dept of Opthalmology

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 to 66 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Normal color vision status

Description

Inclusion Criteria:

  • normal vision
  • 18-65 years

Exclusion Criteria:

  • blindness
  • colorblind
  • pregnant women
  • prisoners
  • decisionally challenged

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Night Vision
White LED Flashlight, Red/Green Green Dominant LED Flashlight
Device: White LED Flashlight
white light setting
Other Names:
  • Tomahawk serial number TMC12420
Device: Red/Green Green Dominant LED Flashlight
Green LED light dominant setting
Other Names:
  • Tomahawk serial number TMC12420, green dominant setting

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Normal Color vision
Time Frame: 1 hr
The Farnsworth Munsell 100 Hue Test is used to determine normal color vision and vision using the red green Tomahawk LED flashlight.
1 hr

Collaborators and Investigators

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

Sponsor

University of Colorado, Denver

Investigators

  • Principal Investigator: Mark Petrash, PhD, University of Colorado, Denver

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)

April 23, 2013

Primary Completion (Actual)

January 10, 2019

Study Completion (Actual)

January 10, 2019

Study Registration Dates

First Submitted

August 2, 2013

First Submitted That Met QC Criteria

August 19, 2013

First Posted (Estimate)

August 22, 2013

Study Record Updates

Last Update Posted (Actual)

May 15, 2019

Last Update Submitted That Met QC Criteria

May 13, 2019

Last Verified

May 1, 2019

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 13-0387

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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