Light to Maximize Vision, Minimize Insomnia

VA Palo Alto Health Care System29 enrolled

Overview

The purpose of this study is to determine whether specific wavelengths of light at night can be used to improve mobile balance while simultaneously not increasing alertness.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Postural Balance

Interventions

LightOTHER

Eligibility

Sex: ALLMin age: 55 YearsMax age: 85 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Aged 55-85 * At least 20/200 corrected visual acuity * Greater than 20° visual field with no lower visual field loss * Stable health * Male or female * Normal color vision * Normal hearing Exclusion Criteria: * Extreme chronotype * Sleep disorders * Dementia * Smoker * Depression * Alcohol abuse * Use of illegal drugs * Use of sleep/wake altering drugs on an acute or as needed basis (including nutraceuticals, antihistamines) * Use of light sensitizing drugs * Self-reported history of nocturia (\>3 times per night)

Locations (1)

VA Palo Alto Health Care System

Palo Alto, California, United States

Outcomes

Primary Outcomes

Mobile balance

Mobile balance as determined using a GaitRite walkway

Time frame: 15 minutes

Alertness

Alertness as determined by electroencephalographic power density

Time frame: 15 minutes

Data from ClinicalTrials.gov

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