Electroretinography Center - Leesburg, VA
Leesburg 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 Leesburg * Virginia Retina Center  Flinton Callahan II MD  Virginia Eye Center  Virginia Eye Center  Virginia Eye Center  Eye Center of Northern VA  Eye Center of Northern VA  Eye Center of Northern VA  Sedgewick Eye Associates  Joanne Crenshaw MD  Joanne Crenshaw MD  David Chow MD  Eye Physicians of Virginia  Heidi Lisker MD  Elle Milani MD  Ophthalmic Plastic Consultants  New Vew Eye Center  New Vew Eye Center  Northern Virginia Ophthalmology Associates  Eye Plastic Associates PC  Timothy J Malone MD  Alan Egge MD  Dressler Ophthalmology Assoc  Dressler Ophthalmology Assoc  Virginia Eye Care Center  Virginia Eye Care Center  Andy Hay MD  David R Notes MD  Daniel H Framm & Lisa F Sklar MDs  Daniel H Framm & Lisa F Sklar MDs  Mitchell Eye Institute  Mitchell Eye Institute  Eye Associates of Washington  Eye Associates of Washington  Eye Associates of Washington  Fairfax Eye Associates  Fairfax Eye Associates  The Eye Institute Inc  Northern Virginia Center For Eye Care  Capital Eye Consultants  The Retina Group Of Washington  Juliana Y Park MD PC  The Retina Group Of Washington  The Retina Group Of Washington  Childrens National Medical Center Ophthalmology  Roger A Snyder MD  Metropolitan Ophthalmology Associates  Metropolitan Ophthalmology Associates  Eye Physicians of Virginia  Retina Consultants PC  Retina Consultants PC  Retina Consultants PC  Retina Consultants PC  Silk Vision and Surgical Center  Retina Consultants PC  Joseph J Timmes Jr. MD  Leonard Barmak MD  John R Karickhoff MD  Robert Kling MD  Alan Egge MD  Alan Egge MD  Alan Egge MD  Eye Consultants of Northern Virginia PC  Eye Consultants of Northern Virginia PC  Eye Consultants of Northern Virginia PC  Eye Consultants of Northern Virginia PC  Jorge Campana MD  Northern Virginia Ophthalmology Associates  Northern Virginia Ophthalmology Associates  Northern Virginia Ophthalmology Associates  Northern Virginia Ophthalmology Associates  Northern Virginia Ophthalmology Associates  Falls Church Medical Center  The Arlington Eye Center Inc  The Arlington Eye Center Inc  Retina Centers of Washington  See Clearly Vision of Arlington  Insight Vision Center  Potomac Eye Center  Insight Vision Center  Bijan Youssefi MD  Amy Kotecha MD  Joseph F Territo MD  Preston C Calvert MD  Drs Huberman & Pollack  Drs Huberman & Pollack  Sina J Sabet MD  Advanced Eye Care  Potomac Retina LLC  Maureen T O'Dea MD  Aaron Figler MD  Babur B Lateef MD  Jacob Clark MD  Winchester Eye Specialist  Winchester Eye Specialist  Winchester Eye Specialist  Eye Associates of Winchester  Eye Associates of Winchester  Alan J Fink MD & Michael Deiboldt OD  Advanced Eye Care Leesburg, VirginiaUpcoming Local Events2012-05-27
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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 Usher syndrome?Usher syndrome is the most common condition that affects both hearing and vision. A syndrome is a disease or disorder that has more than one feature or symptom. The major symptoms of Usher syndrome are hearing loss and an eye disorder called retinitis pigmentosa, or RP. RP causes night-blindness and a loss of peripheral vision (side vision) through the progressive degeneration of the retina. The retina is a light-sensitive tissue at the back of the eye and is crucial for vision. As RP progresses, the field of vision narrows - a condition known as "tunnel vision" - until only central vision (the ability to see straight ahead) remains. Many people with Usher syndrome also have severe balance problems. There are three clinical types of Usher syndrome:
In the United States, types 1 and 2 are the most common types. Together, they... Other Related Electroretinography ArticlesEmergency Contact for Leesburg
Nearby Leesburg Hospitals *Graydon Manor Behavioral Health North Spring Behavioral Healthcare Inova Loudoun Hospital Center Reston Hospital Center Inova Fair Oaks Hospital Adventist Rehabilitation Hospital of Maryland Potomac Ridge Behavioral Health Adventist HealthCare Shady Grove Adventist Hospital Jefferson Memorial Hospital Frederick Memorial Hospital Prince William Hospital Suburban Hospital Inova Fairfax Hospital Inova Fairfax Hospital for Children Northern Virginia Mental Health Institute National Institutes of Health Montgomery General Hospital Sibley Memorial Hospital Dominion Hospital Martinsburg VA Medical Center Virginia Hospital Center Psychiatric Institute of Washington Holy Cross Hospital Georgetown University Hospital Walter Reed Army Medical Center Fauquier Hospital The George Washington University Hospital Washington Adventist Hospital Inova Alexandria Hospital City Hospital Howard University Hospital National Rehabilitation Hospital Washington Hospital Center Children's National Medical Center Washington DC VA Medical Center Providence Hospital The HSC Pediatric Center Winchester Medical Center The Specialty Hospital of Washington 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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Usher Syndrome
- There are three types of Usher (Usher's) syndrome, the most common condition that affects both vision and hearing. The major symptoms of Usher syndrome include retinitis pigmentosa (night-blindness and a loss of peripheral vision), and hearing loss. Usher syndrome is a genetic condition. There is no cure for Usher syndrome.
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