Color and Pupil Function

November 1, 2016 updated by: Jamie M. Zeitzer, Ph.D., VA Palo Alto Health Care System

Effect of Light Spectrum on Pupil Function

This study will examine the effects of different colors of light on pupil function and alertness.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

10

Phase

  • Not Applicable

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 35 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Aged 18-35
  • Good health

Exclusion Criteria:

  • Sleep disorder
  • Extreme chronotype
  • Smoker
  • Abnormal color vision
  • Ocular pathology (other than mild or moderate refractive error)
  • Visual field defects
  • Alcohol abuse
  • Use of illegal drugs

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: Basic Science
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Light
Randomized amount and color of light
Other: Light
A brief, 1 minute exposure to light of varying color and intensity. The combination of color and intensity will be the same in all participants, but the order in which they are received is randomized.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in pupil size
Time Frame: Baseline and 10 minutes
Change in pupil size from baseline during and following brief light exposure
Baseline and 10 minutes

Collaborators and Investigators

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

Sponsor

VA Palo Alto Health Care System

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

February 1, 2016

Primary Completion (Actual)

August 1, 2016

Study Completion (Actual)

August 1, 2016

Study Registration Dates

First Submitted

December 17, 2015

First Submitted That Met QC Criteria

December 18, 2015

First Posted (Estimate)

December 21, 2015

Study Record Updates

Last Update Posted (Estimate)

November 2, 2016

Last Update Submitted That Met QC Criteria

November 1, 2016

Last Verified

November 1, 2016

More Information

Terms related to this study

Other Study ID Numbers

  • IRB-36326

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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