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

Color Blindness, Acquired Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01927536
• Other study ID #: 13-0387
• Status: Completed
• Start date: April 23, 2013
• Est. completion date: January 10, 2019

Study information

• Verified date: May 2019
• Source: University of Colorado, Denver
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 39
• Est. completion date: January 10, 2019
• Est. primary completion date: January 10, 2019
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 66 Years

Eligibility

Inclusion Criteria:

• normal vision

• 18-65 years

Exclusion Criteria:

• blindness

• colorblind

• pregnant women

• prisoners

• decisionally challenged

Related Conditions & MeSH terms

• Blindness
• Color Blindness, Acquired
• Color Vision Defects

Intervention

Device:
• White LED Flashlight
white light setting
• Red/Green Green Dominant LED Flashlight
Green LED light dominant setting

Locations

Country	Name	City	State
United States	University of Colorado Dept of Opthalmology	Aurora	Colorado

Sponsors (1)

Lead Sponsor	Collaborator
University of Colorado, Denver

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in Normal Color vision	The Farnsworth Munsell 100 Hue Test is used to determine normal color vision and vision using the red green Tomahawk LED flashlight.	1 hr