Electroretinography Center - Olney, MD
Olney 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 Olney * Medical Eye Center PA  Medical Eye Center PA  Medical Eye Center PA  Medical Eye Center PA  Stuart H Lessans MD  Stuart H Lessans MD  Bradley Eye Associates Inc  Natasha Herz & Stephen P Ginsberg MDs  Natasha Herz & Stephen P Ginsberg MDs  Rockville Eye Associates  Robert H Chu MD PA  Lawrence Frank MD  Lawrence Frank MD  Rockville Eye Associates  Marshall P Keys MD  Rockville Eye Associates  The Retina Group Of Washington  The Retina Group Of Washington  The Retina Group Of Washington  The Retina Group Of Washington  The Retina Group Of Washington  The Retina Group Of Washington  The Retina Group Of Washington  Herbert B Gould MD  Robert A Ralph MD  Hammerman Wanicur & Kane MDs  Hammerman Wanicur & Kane MDs  Hammerman Wanicur & Kane MDs  Hammerman Wanicur & Kane MDs  Marcia L Hutcheon MD  Gerald Rogell MD  The Eye Center Inc  Milne Eye Medical Center  Maryland Eye Consultants & Surgeons  Maryland Eye Consultants & Surgeons  Maryland Eye Consultants & Surgeons  Maryland Eye Consultants & Surgeons  Maryland Eye Consultants & Surgeons  Glaser & Luck MDs  Glaser & Luck MDs  The Eye Center Inc  Retina Centers of Washington  The Eye Center Inc  Jerome B Gabry MD  Narieman Nik MD  David J Levine MD PA  Farhad Naseh MD  Visionary Opthalmalogy  Champlain Opthalmologists  Champlain Opthalmologists  Visionary Opthalmalogy  Visionary Opthalmalogy  Retina Consultants PC  Retina Consultants PC  Retina Consultants PC  Retina Consultants PC  David F Plotsky MD PC  Shady Grove Ophthalmology  Retina Consultants PC  Edward A Tsoy MD  Bethesda Retina LLC  John F Anderschat MD  Rosalie L Bair MD  Harry H Huang MD  Drs Jonathan S Lyons & Thomas Yau MD  Drs Jonathan S Lyons & Thomas Yau MD  Michael D Baum MD  Drs Rodman Engelstein & Gutmark MD  Drs Rodman Engelstein & Gutmark MD  Drs Rodman Engelstein & Gutmark MD  Joseph Snyder MD  James A Loreto MD  Charles F Bahn MD  Robert B Kaufman MD  Mitchell Eye Institute  Mitchell Eye Institute  George A Patterson MD  Bethesda Neurology LLC  National Retina Institute  Metropolitan Ophthalmology Associates  Metropolitan Ophthalmology Associates  Washington Eye Physicians & Surgeons  Washington Eye Physicians & Surgeons  Brooks G Brown III MD  The Retina Group Of Washington  Washington Eye Physicians & Surgeons  Drs Blackburn Hamill & Mackin  Washington Eye Physicians & Surgeons  The Retina Group Of Washington  Washington Eye Physicians & Surgeons  The Retina Group Of Washington  Washington Eye Physicians & Surgeons  Washington Eye Physicians & Surgeons  Washington Eye Physicians & Surgeons  Eye Doctors of Washington  Eye Doctors of Washington  Eye Doctors of Washington  Eye Doctors of Washington  Eye Doctors of Washington  Eye Doctors of Washington Olney, 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 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 Olney
Nearby Olney Hospitals *Montgomery General Hospital Shady Grove Adventist Hospital Adventist Rehabilitation Hospital of Maryland Potomac Ridge Behavioral Health Adventist HealthCare Holy Cross Hospital Suburban Hospital National Institutes of Health Howard County General Hospital Laurel Regional Hospital Washington Adventist Hospital Walter Reed Army Medical Center Psychiatric Institute of Washington Providence Hospital Sibley Memorial Hospital The HSC Pediatric Center National Rehabilitation Hospital Washington Hospital Center Washington DC VA Medical Center Children's National Medical Center Doctors Community Hospital Howard University Hospital Georgetown University Hospital Sheppard Pratt at Ellicott City Gladys Spellman Specialty Hospital Prince George's Hospital Center The George Washington University Hospital Springfield Hospital Center The Specialty Hospital of Washington Virginia Hospital Center Dominion Hospital Spring Grove Hospital Center United Medical Center Reston Hospital Center Northwest Hospital Saint Elizabeth's Hospital Inova Fairfax Hospital Inova Fairfax Hospital for Children Northern Virginia Mental Health Institute Kernan Hospital Inova Loudoun Hospital Center Inova Alexandria Hospital The Specialty Hospital of Washington-Hadley Saint Agnes Hospital Baltimore Washington Medical Center Bon Secours Baltimore Health System Inova Fair Oaks Hospital Harbor Hospital Center Baltimore VA Medical Center North Spring Behavioral Healthcare University of Maryland Medical Center Levindale Hebrew Geriatric Center & Hospital Sinai Hospital of Baltimore University Specialty Hospital Maryland General Hospital Mercy Medical Center Frederick Memorial Hospital Mt Washington Pediatric Hospital Union Memorial Hospital Kennedy Krieger Institute Johns Hopkins Hospital Graydon Manor Behavioral Health Inova Mount Vernon Hospital Carroll Hospital Center Sheppard Pratt Health System Greater Baltimore Medical Center Johns Hopkins Bayview Medical Center St Joseph Medical Center Fort Washington Hospital Good Samaritan Hospital of Maryland Southern Maryland Hospital Center Anne Arundel Medical Center Franklin Square Hospital Center Prince William 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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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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Usher Syndrome
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