Electroretinography Center - Ellicott City, MD
Ellicott City Eye Doctor Doctors for ElectroretinographyType of Physician: Eye Doctor What is a Eye Doctor? A certification by the Board of Ophthalmology; practitioners provide comprehensive eye and vision care. They are trained to diagnose, monitor and medically or surgically treat all eyelid and orbital problems affecting the eye and visual pathways, and to diagnose, monitor and treat all eye and visual disorders. They often prescribe vision services (glasses and contact lenses) as well as serve as a consultant to physicians and other professionals. Specialty: Ophthalmology Common Name: Eye Doctor Eye Doctor Doctors in Ellicott City * Medical Eye Center PA  Medical Eye Center PA  Medical Eye Center PA  Medical Eye Center PA  Jay C Grochmal MD  W Jackson Iliff MD  Joanne Waeltermann MD  Physicians Eye Care Center LLC  Physicians Eye Care Center LLC  Physicians Eye Care Center LLC  Physicians Eye Care Center LLC  Physicians Eye Care Center LLC  Jay C Grochmal MD  Omni Eye Specialists  Omni Eye Specialists  Omni Eye Specialists  Patapsco Eye MDs LLC  Patapsco Eye MDs LLC  Nader G Gary MD  Darab Hormozi MD  Nader G Gary MD  Wilmer Eye Institute at Columbia  Wilmer Eye Institute at Columbia  Patrick Y Tong MD PhD  Maryland Center for Neuro Ophthalmology & Neuro-otology  Florence Davidovski MD PA  Edward J Goldman MD  Sharon C Gross MD  Maryland Neuro-Ophthalmology  Leon Strauss MD  Krieger Eye Institute  Zulfiqar Ali MD  Clinical Associates PA Pikesville  Eye Care Associates MD  Eye Care Associates MD  Brull & Honig MD PA & Associates  Brull & Honig MD PA & Associates  Richard A Gruen MD  Brull & Honig MD PA & Associates  University of Maryland Eye Associates  Eye Consultants of Maryland  Eye Consultants of Maryland  Alfred A Meisels MD  Eye Consultants of Maryland  Mark W Preslan MD  Eye Consultants of Maryland  Eye Consultants of Maryland  University of Maryland Eye Associates  Brull & Honig MD PA & Associates  Raymond W Doyle MD  Patricia L Schmoke MD  Krieger Eye Institute  Krieger Eye Institute  Krieger Eye Institute  Krieger Eye Institute  Krieger Eye Institute  Krieger Eye Institute  Krieger Eye Institute  Krieger Eye Institute  Sinai Hospital Ophthalmology  Sinai Hospital Ophthalmology  Eye Care & Surgical Center  Eye Care & Surgical Center  Select Eye Care  Select Eye Care  University of Maryland Eye Associates  University of Maryland Eye Associates  University of Maryland Eye Associates  University of Maryland Eye Associates  University of Maryland Eye Associates  University of Maryland Eye Associates  Duane M Bryant MD  Alan L Robin MD  The Retina Care Center  The Retina Care Center  Katzen Eye Group  Eye & Cosmetic Surgery Center  Katzen Eye Group  Katzen Eye Group  Katzen Eye Group  Katzen Eye Group  John A Kiely MD  Katzen Eye Group  Katzen Eye Group  Vincent Notarangelo MD  Jay N Parran MD  Eye & Cosmetic Surgery Center  Nancy J Ronsheim MD  Allan D Jensen MD  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station  Ronald C Richter MD  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station  Wilmer Eye Institute at Green Spring Station Ellicott City, MarylandUpcoming Local Events2012-06-02
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ElectroretinographyRead the Electroretinography article » What is electroretinography?Electroretinography (ERG) is an eye test used to detect abnormal function of the retina (the light-detecting portion of the eye). Specifically, in this test, the light-sensitive cells of the eye, the rods and cones, and their connecting ganglion cells in the retina are examined. During the test, an electrode is placed on the cornea (at the front of the eye) to measure the electrical responses to light of the cells that sense light in the retina at the back of the eye. These cells are called the rods and cones. How is an ERG done?The patient assumes a comfortable position (lying down or sitting up). Usually the patient's eyes are dilated beforehand with standard dilating eye drops. Anesthetic drops are then placed in the eyes, causing them to become numb. The eyelids are then propped open with a speculum, and an electrode is gently placed on each eye with a device very similar to a contact lens. An additional electrode is placed on the skin to provide a ground for the very faint electrical signals produced by the retina. During an ERG recording session, the patient watches a standardized light stimulus, and the resulting signal is interpreted in terms of its amplitude (voltage) and time course. This test can even be performed in cooperative children, as well as sedated or anesthetized infants. The visual stimuli include flashes, called a flash ERG, and reversing checkerboard patterns, known as a pattern ERG.
What do the electrodes do?The electrodes measure the electrical activity of the retina in response to light. The information that comes from each electrode is transmitted to a monitor where it is displayed as two types of waves, labeled the A waves and B waves.
How are eletroretinography readings made?Readings during eletroretinography are usually taken first in normal room light. The lights... Recommended Reading Related to ElectroretinographyWhat is a visual field test?A visual field test is a method of measuring an individual's entire scope of vision, that is their central and peripheral (side) vision. Visual field testing actually maps the visual fields of each eye individually. The visual field test is a subjective examination, requiring the patient to understand the testing instructions, fully cooperate, and complete the entire test in order to provide useful information. What is a visual field test used for?Visual field testing is most frequently used to detect any signs of glaucoma damage to the optic nerve. In addition, visual field tests are useful for detection of central or peripheral retinal disease, eyelid conditions such as ptosis or drooping, optic nerve disease, and diseases affecting the visual pathways within the brain. The visual pathways carry information from the eye to the visual or occipital cortex in the brain, where this information is proces... Other Related Electroretinography ArticlesEmergency Contact for Ellicott City
Nearby Ellicott City Hospitals *Sheppard Pratt at Ellicott City Spring Grove Hospital Center Kernan Hospital Howard County General Hospital Northwest Hospital Saint Agnes Hospital Bon Secours Baltimore Health System Levindale Hebrew Geriatric Center & Hospital Sinai Hospital of Baltimore Baltimore VA Medical Center University of Maryland Medical Center Maryland General Hospital Harbor Hospital Center University Specialty Hospital Mercy Medical Center Mt Washington Pediatric Hospital Union Memorial Hospital Kennedy Krieger Institute Johns Hopkins Hospital Springfield Hospital Center Sheppard Pratt Health System Greater Baltimore Medical Center Baltimore Washington Medical Center Good Samaritan Hospital of Maryland St Joseph Medical Center Johns Hopkins Bayview Medical Center Laurel Regional Hospital Montgomery General Hospital Franklin Square Hospital Center Doctors Community Hospital Holy Cross Hospital Carroll Hospital Center Washington Adventist Hospital Walter Reed Army Medical Center Anne Arundel Medical Center Prince George's Hospital Center National Institutes of Health Shady Grove Adventist Hospital Gladys Spellman Specialty Hospital Suburban Hospital Adventist Rehabilitation Hospital of Maryland Potomac Ridge Behavioral Health Adventist HealthCare The HSC Pediatric Center Providence Hospital Washington DC VA Medical Center National Rehabilitation Hospital Washington Hospital Center Children's National Medical Center Psychiatric Institute of Washington Howard University Hospital United Medical Center The Specialty Hospital of Washington Sibley Memorial Hospital The George Washington University Hospital Georgetown University Hospital Upper Chesapeake Medical Center Saint Elizabeth's Hospital Virginia Hospital Center The Specialty Hospital of Washington-Hadley Dominion Hospital Frederick Memorial Hospital Inova Alexandria Hospital Featured Articles*Provider Directory Terms of Use: The WebMD 'Provider Directory' is provided by WebMD for use by the general public as a quick reference of information about Providers. The Provider Directory is not intended as a tool for verifying the credentials, qualifications, or abilities of any Provider contained therein. Inclusion in the Provider Directory does not imply recommendation or endorsement nor does omission in the Provider Directory imply WebMD disapproval. |
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