Study of Stimulus Parameters in Flicker Electroretinogram (ERG)

June 8, 2015 updated by: LKC Technologies, Inc.

The electroretinogram (ERG) is a diagnostic test that measures the electrical activity generated by cells in the retina in response to a light stimulus. Typically, an ERG is recorded with white flash when the pupil is dilated. RETeval Visual Diagnostic Device (RETeval) generates an array of color flashes, which allows studying whether color flash would be a useful diagnostic tool.

Full pupil dilation is required to obtain a response from the whole retina. However, this requirement often limits a patient's flow in the clinic and increases the overall time patients spend at the eye practitioner. RETeval provides the possibility of recording ERGs in un-dilated pupils therefore making the whole exam easier and shorter. These results need to be compared to the classic, fully dilated ERG and evaluated for efficiency.

The purpose of this research study is to use the RETeval device to measure the eye's electrical response and how it changes with different stimuli such as changing flash color or pupil dilation.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

20

Phase

  • Not Applicable

Contacts and Locations

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

Study Contact

Study Locations

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

16 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • healthy adult volunteers
  • volunteers able to get their pupil fully dilated

Exclusion Criteria:

  • pregnant women
  • children
  • subjects with
  • light sensitivity
  • photosensitive epilepsy
  • allergies or sensitivity to pupil dilation ophthalmic solutions
  • history of glaucoma
  • cardiac dysrhythmia will not be invited to participate in this study.
  • Pregnancy status, light sensitivity and photosensitive epilepsy will be based on volunteer's providing this information at the time of signing the consent form

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: Randomized
  • Interventional Model: Factorial Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: RETeval color flicker ERG
Compare implicit times and amplitudes of electroretinograms obtained from series of color flashes to those obtained from white flashes.
Device: RETeval color flicker ERG
Flicker ERGs obtained to 56 CIE 1931 (created by the International Commission on Illumination (CIE) in 1931) colors series. White flash of 0,33, 0,33 was used for comparison.
Other: RETeval dilated versus un-dilated flicker ERG
Compare implicit times and amplitudes of ERGs obtained from cd/m2/sec stimulation (used with dilated pupils) to those obtained from troland stimulation (used with un-dilated pupils).
Device: RETeval dilated versus un-dilated flicker ERG
Two series of white flashes: 3,0 cd/m2/sec and Trolands equivalent assuming 3,7 mm pupil size, delivered at 3 min interval over 30 min.
Other: pupil dilation
Pupil will be dilated using Proparacaine 0.5% and Tropicamide 0.5%

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Flicker harmonic amplitude
Time Frame: up to 2 mnths
up to 2 mnths
Flicker harmonic implicit time
Time Frame: up to 2 months
up to 2 months
Flicker fundamental amplitude
Time Frame: up to 2 months
up to 2 months
Flicker fundamental implicit time
Time Frame: up to 2 months
up to 2 months

Collaborators and Investigators

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

Sponsor

LKC Technologies, Inc.

Investigators

  • Principal Investigator: Olga Kraszewska, Ph.D., LKC Technologies

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

March 1, 2015

Primary Completion (Anticipated)

July 1, 2015

Study Completion (Anticipated)

July 1, 2015

Study Registration Dates

First Submitted

June 3, 2015

First Submitted That Met QC Criteria

June 8, 2015

First Posted (Estimate)

June 9, 2015

Study Record Updates

Last Update Posted (Estimate)

June 9, 2015

Last Update Submitted That Met QC Criteria

June 8, 2015

Last Verified

June 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SAIRB-15-0017

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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