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OpenTrials
Completed

NCT Number: NCT02636140

Color and Pupil Function

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

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Key information

Conditions

Pupil

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Who can participate

Healthy volunteers accepted: Yes

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

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

Treatment and study plan

light

Other

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.

Primary outcomes

  1. Change in pupil size

    Time frame: Baseline and 10 minutes

    Change in pupil size from baseline during and following brief light exposure

Sponsors and collaborators

Lead sponsor

VA Palo Alto Health Care System

Fed

Registry information

Official study title

Effect of Light Spectrum on Pupil Function

Important dates

Study start
2016
Primary completion
2016
Study completion
2016
First posted
Dec 21, 2015
Registry last updated
Nov 2, 2016

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.

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