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

Completed

• Conditions: Color Blindness, Acquired
• Interventions: Device: White LED Flashlight; Device: Red/Green Green Dominant LED Flashlight

• Registration Number: NCT01927536
• Lead Sponsor: University of Colorado, Denver

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2013-04-23
• Study First Submitted: 2013-08-02
• Study First Submitted QC: 2013-08-19
• Study First Posted: 2013-08-22
• Primary Completion: 2019-01-10
• Study Completion: 2019-01-10
• Status Verified: 2019-05
• Last Update Submitted: 2019-05-13
• Last Update Posted: 2019-05-15

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 39

Inclusion Criteria

• normal vision
• 18-65 years

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Exclusion Criteria

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

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Night Vision	Red/Green Green Dominant LED Flashlight	White LED Flashlight, Red/Green Green Dominant LED Flashlight
Night Vision	White LED Flashlight	White LED Flashlight, Red/Green Green Dominant LED Flashlight

Primary Outcome Measures

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

Trial Locations

Locations (1)

University of Colorado Dept of Opthalmology; 🇺🇸 Aurora, Colorado, United States