HealthyNCT00001610
Normal Human Electro-Oculogram
An observational study of Healthy, run by National Eye Institute (NEI) at 1 site in United States.
Trial summary
This study will measure the normal range of the human electro-oculogram (EOG) in people of various age groups. EOGs are recordings of electrical signals generated by the retina (the light-sensitive tissue in the back of the eye) when going from a dark to a bright environment. Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Healthy
- How many people
- 150 participants
- Where
- 1 siteUnited States
- Study dates
- Feb 1997to Mar 2003
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Subjects must have best corrected visual acuity equal or better than 20/20.
Subjects must have normal visual fields.
Subjects must have normal color vision.
Subjects must have a normal ophthalmological exam.
Subjects should not be subjective to or objective evidence of visual loss.
Subjects cannot have subjective evidence of abnormal night vision or subjective evidence of abnormal light sensitivity.
Subjects cannot have a personal history of non-trivial ocular disease.
Subjects cannot have a family history of hereditary ocular disease.
Subjects cannot have current systemic disease.
Subjects cannot currently take neuropharmacological medication.
Subjects will not be admitted with an abnormal ophthalmological examination.
Subjects will need the ability to cooperate with EOG recording.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Eye Institute (NEI)
Bethesda, Maryland, 20892
About this study
This study will measure the normal range of the human electro-oculogram (EOG) in people of various age groups. EOGs are recordings of electrical signals generated by the retina (the light-sensitive tissue in the back of the eye) when going from a dark to a bright environment. They provide valuable information about the function of the eye in health and disease. A knowledge of what results are to be expected in tests of normal, healthy eyes will be valuable in assessing EOG results in patients with known or suspected retinal diseases.
Normal volunteers from ages 6 to 65 who have healthy eyes and normal eyesight will participate in this study. Candidates will undergo tests to check vision and the health of the eye. Study participants will then have an electro-oculogram. In this test, eye drops are placed in the eye to enlarge the pupils. Two electrodes (small disks that picks up electrical signals) are attached to the left and right of each eye and one to the forehead. (These are similar to electrodes placed on the body during an electrocardiogram (ECG), which measures electrical signals from the heart.) During the EOG recording, the volunteer looks at the inside of a hollow sphere, following with their eyes small red lights that turn on and off. The background light is also turned on or off during the test. Some volunteers may be asked to repeat the EOG at another time.
Study participants may also be asked to provide a blood sample for tests to study how the immune cells in the blood respond to proteins found in the retina. The response from normal volunteers will be compared with that of patients with eye diseases like retinitis pigmentosa.
Read the detailed description
Electro-oculograms (EOGs) will be recorded in volunteers of different age groups with normal visual function. The fast and slow oscillations of the EOG will be studied. For the analysis of fast EOG oscillations, peak-to-peak amplitude (micro V), peak-to-trough ratio, and phase (degrees) will be measured. The analysis of slow EOG oscillations will include measurements of the ratio of light peak to dark trough (Arden ratio), implicit time (latency) of the light peak (ms), and amplitude of the dark trough (micro V).
- Conditions
- Healthy
- Keywords
- Standing Potential, Fast Oscillation, Slow Oscillation, Retinal Pigment, Epithelium, Electro-oculogram, Cellular Immune Response, Retinal Antigens, IRBP, S-Antigen, Normal Volunteer
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Nov 1999 (estimated)
- Study startFeb 1997
- Study completionMar 2003
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for HealthyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Enrolment
- 150 participants
Sponsor and investigators
- Lead sponsor
- National Eye Institute (NEI)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00001610
- Sponsor's protocol ID
- 970080
- Other IDs
- 97-EI-0080
- Status last verified
- Mar 2003
- First submitted
- 3 Nov 1999
- Last updated
- 4 Mar 2008
- Results posted
- No
Publications
Guideline nine: guidelines on evoked potentials. American Electroencephalographic Society. J Clin Neurophysiol. 1994 Jan;11(1):40-73. No abstract available.
PubMed 8195426Steinberg RH. Interactions between the retinal pigment epithelium and the neural retina. Doc Ophthalmol. 1985 Oct 15;60(4):327-46. doi: 10.1007/BF00158922.
PubMed 3905312Marmor MF, Zrenner E. Standard for clinical electro-oculography. International Society for Clinical Electrophysiology of Vision. Arch Ophthalmol. 1993 May;111(5):601-4. doi: 10.1001/archopht.1993.01090050035023.
PubMed 8489436
Study at a glance
From the registry record, last updated by the sponsor on 4 Mar 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Normal Human Electro-Oculogram
- ClinicalTrials.gov ID
- NCT00001610
- Acronym / sponsor ID
- 970080
- Conditions
- Healthy
- Keywords
- Standing Potential, Fast Oscillation, Slow Oscillation, Retinal Pigment, Epithelium, Electro-oculogram, Cellular Immune Response, Retinal Antigens
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 150 participants
- Lead sponsor
- National Eye Institute (NEI)US National Institutes of Health
- Study start
- Feb 1997
- Study completion
- Mar 2003
- First posted
- 4 Nov 1999 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will measure the normal range of the human electro-oculogram (EOG) in people of various age groups. EOGs are recordings of electrical signals generated by the retina (the light-sensitive tissue in the back of the eye) when going from a dark to a bright environment. They provide valuable information about the function of the eye in health and disease. A knowledge of what results are to be expected in tests of normal, healthy eyes will be valuable in assessing EOG results in patients with known or suspected retinal diseases.
Normal volunteers from ages 6 to 65 who have healthy eyes and normal eyesight will participate in this study. Candidates will undergo tests to check vision and the health of the eye. Study participants will then have an electro-oculogram. In this test, eye drops are placed in the eye to enlarge the pupils. Two electrodes (small disks that picks up electrical signals) are attached to the left and right of each eye and one to the forehead. (These are similar to electrodes placed on the body during an electrocardiogram (ECG), which measures electrical signals from the heart.) During the EOG recording, the volunteer looks at the inside of a hollow sphere, following with their eyes small red lights that turn on and off. The background light is also turned on or off during the test. Some volunteers may be asked to repeat the EOG at another time.
Study participants may also be asked to provide a blood sample for tests to study how the immune cells in the blood respond to proteins found in the retina. The response from normal volunteers will be compared with that of patients with eye diseases like retinitis pigmentosa.
Detailed description
Electro-oculograms (EOGs) will be recorded in volunteers of different age groups with normal visual function. The fast and slow oscillations of the EOG will be studied. For the analysis of fast EOG oscillations, peak-to-peak amplitude (micro V), peak-to-trough ratio, and phase (degrees) will be measured. The analysis of slow EOG oscillations will include measurements of the ratio of light peak to dark trough (Arden ratio), implicit time (latency) of the light peak (ms), and amplitude of the dark trough (micro V).
Study design
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Mar 2008.
- Background: PubMed 8195426Guideline nine: guidelines on evoked potentials. American Electroencephalographic Society. J Clin Neurophysiol. 1994 Jan;11(1):40-73. No abstract available.
- Background: PubMed 3905312Steinberg RH. Interactions between the retinal pigment epithelium and the neural retina. Doc Ophthalmol. 1985 Oct 15;60(4):327-46. doi: 10.1007/BF00158922.
- Background: PubMed 8489436Marmor MF, Zrenner E. Standard for clinical electro-oculography. International Society for Clinical Electrophysiology of Vision. Arch Ophthalmol. 1993 May;111(5):601-4. doi: 10.1001/archopht.1993.01090050035023.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Healthy, run by National Eye Institute (NEI) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Mar 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00001610, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Mar 2008.