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

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.

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Key information

Conditions

Color Blindness, Acquired Color Vision Defects Cone Dystrophy Eye Diseases Eye Diseases, Hereditary Nervous System Diseases Neurologic Manifestations Pathological Conditions, Signs and Symptoms Sensation Disorders Signs and Symptoms Vision Disorders

Age range

18 year–66 year

Sex eligibility

All sexes

Study type

Observational

Primary location

University of Colorado Dept of Opthalmology

Aurora, Colorado, 80045, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

normal vision
18-65 years

Exclusion criteria

blindness
colorblind
pregnant women
prisoners
decisionally challenged

Treatment and study plan

White LED Flashlight

Device

white light setting

Other names: Tomahawk serial number TMC12420

Red/Green Green Dominant LED Flashlight

Device

Green LED light dominant setting

Other names: Tomahawk serial number TMC12420, green dominant setting

Primary outcomes

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.

Sponsors and collaborators

Lead sponsor

University of Colorado, Denver

Other

Registry information

Important dates

Study start: 2013
Primary completion: 2019
Study completion: 2019
First posted: Aug 22, 2013
Registry last updated: May 15, 2019

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed