Effect of Ambient Light on the Parameters of the Pupillary Light Reflex

September 22, 2010 updated by: University of Medicine and Dentistry of New Jersey
The purpose of this study is to determine the effects of varying luminescent levels on the pupillary response.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Evaluation of the pupillary response is an underemphasized aspect of the assessment of visual function. The pupillary light reflex is one of the few objective indicators of afferent input from the retina and optic nerve. Since the pupillary light reflex is processed through the retina, it may be used to assess visual integrity (1). Pupillometry is a reliable technology capable of providing repetitive data on quantitative pupillary function in states of health and disease (2). Amplitude, latency, maximum constriction velocity, mean constriction velocity, and dilation velocity are measured using the Neuroleptics pupillometer. The effects of varying levels of ambient light on these parameters of the pupillary response have not been extensively studied. The purpose of this investigation is to determine the effects of varying luminescent levels on the pupillary response.

Study Type

Observational

Enrollment (Anticipated)

30

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New Jersey
      • Newark, New Jersey, United States, 07101
        • UMDNJ-University Hospital

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 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Healthy volinteers

Description

Inclusion Criteria:

  • healthy volunteers

Exclusion Criteria:

  • recent bout of conjunctivitis or infection in the eye recent eye surgery seizure disorder unable to lie flat for 30 minutes known history of eye disease which cannot be corrected with lenses

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

  • Observational Models: Case-Control
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
no condition
no condition - healthy volunteers
Other: Pupillometry
Pupillometry readings will be taken at low, intermediate and high ambient light

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
pupillary light reflex: amplitude, latency, maximum constriction velocity, mean constriction velocity and dilation velocity during different levels of ambient light
Time Frame: Pupillometry readings will be taken at 3 potential light readings low light, intermediate light and high ambient light. A total of 48 readings will be done. All parameters will be done at one sitting and will take approximately 45 minutes to complete.
Pupillometry readings will be taken at 3 potential light readings low light, intermediate light and high ambient light. A total of 48 readings will be done. All parameters will be done at one sitting and will take approximately 45 minutes to complete.

Collaborators and Investigators

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

Sponsor

University of Medicine and Dentistry of New Jersey

Investigators

  • Principal Investigator: Lawrence W Chinn, MD, Umdnj-Njms

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

September 1, 2009

Primary Completion (Actual)

February 1, 2010

Study Completion (Actual)

February 1, 2010

Study Registration Dates

First Submitted

January 25, 2010

First Submitted That Met QC Criteria

September 22, 2010

First Posted (Estimate)

September 23, 2010

Study Record Updates

Last Update Posted (Estimate)

September 23, 2010

Last Update Submitted That Met QC Criteria

September 22, 2010

Last Verified

September 1, 2010

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 0120090181

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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