Completed
All Genders
Healthy Volunteers
ID00001610
Normal Human Electro-Oculogram
Led by National Eye Institute (NEI) · Updated on 2008-03-04
150
Participants Needed
1
Research Sites
N/A
Total Duration
On this page
AI-Summary
What this Trial Is About
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.
CONDITIONS
Official Title
Normal Human Electro-Oculogram
Who Can Participate
All Genders
Healthy Volunteers
Eligibility Criteria
You may qualify if you...
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.
You will not qualify if you...
History of severe allergic reactions to study medication Currently pregnant or breastfeeding Recent participation in another clinical trial within the last 30 days Presence of uncontrolled medical conditions that could affect safety
Trial Site Locations
Total: 1 location
1
National Eye Institute (NEI)
Bethesda, Maryland, United States, 20892
Status Unknown
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How is the study designed?
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
0
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Published Research Related To This Trial
Interactions between the retinal pigment epithelium and the neural retina.
R H Steinberg
https://pubmed.ncbi.nlm.nih.gov/3905312Standard for clinical electro-oculography. International Society for Clinical Electrophysiology of Vision.
M F Marmor, E Zrenner
https://pubmed.ncbi.nlm.nih.gov/8489436