Electroretinography Center - Severn, MD
Severn 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 Severn * Edward C Clark MD PA  MD Regional Eye Associates  MD Regional Eye Associates  MD Regional Eye Associates  MD Regional Eye Associates  Humberto A Rossi MD  Bethesda Retina LLC  Sauerburger & Morrison MDs  Sauerburger & Morrison MDs  The Retina Group Of Washington  The Retina Group Of Washington  Drs Ragland & Telahun  Drs Ragland & Telahun  Eye Restoration Clinic  Alden James MD & Paul K Dyer MD  Alden James MD & Paul K Dyer MD  Zuleika M Ghodsi MD  Mid Shore Surgical Eye Center  Mid Shore Surgical Eye Center  George S Malouf Jr. MD  Paul A Dorn Jr. MD  William E Aherne MD  Sepehr Soltani MD  Anne Arundel Eye Center & Sam Boles MD  Allan D Jensen MD  Arlene L Murray MD  Robert B Welch MD  Marie H Brigham MD  William F Bruther MD  Ross D Elliott MD  Chesapeake Eye Care & Laser Center  Chesapeake Eye Care & Laser Center  Chesapeake Eye Care & Laser Center  Eye Doctors of Washington  Retina Associates  Martin J Rosenberg MD  Chesapeake Eye Care & Laser Center  Jeremy S Snow MD  Retina Associates  Eye Doctors of Washington  Retina Associates  Retina Associates  Chesapeake Eye Care & Laser Center  Malouf Eye Center  Advanced Eyecare Medical Center  Ophthalmology Associates of Greater Annapolis  Sharon C Gross MD  Ophthalmology Associates of Greater Annapolis  Ophthalmology Associates of Greater Annapolis  Emil P Moshedi MD  W Jackson Iliff MD  Robert Hsieh MD  Washington Eye Institute  Washington Eye Institute  Washington Eye Institute  George Malouf MD  Solomon Eye Associates  Edward C Watters III MD  Rutzen Eye Specialists  Drs Scott & Gaskins  Banyong Chakshuvej MD  Chesapeake Eye Center PA  Peninsula Eye Surgeons  Peninsula Eye Surgeons  Peninsula Eye Surgeons  Peninsula Eye Surgeons  Tarantino Eye Center  James A Loreto MD  Tarantino Eye Center  Lenita N Gorrell MD  Martin J Shuman MD  Baltimore Washington Eye Center  Drs Rodman Engelstein & Gutmark MD  Drs Rodman Engelstein & Gutmark MD  Michael B Herr MD PA  Baltimore Washington Eye Center  Eye Consultants of Maryland  Eye Consultants of Maryland  Howard F Perell MD  Drs Rodman Engelstein & Gutmark MD  Eye Consultants of Maryland  Joseph Snyder MD  Baltimore Washington Eye Center  The Retina Care Center  The Retina Care Center  Michael D Baum MD  Drs Jonathan S Lyons & Thomas Yau MD  Drs Jonathan S Lyons & Thomas Yau MD  Eye Doctors of Washington  Eye Doctors of Washington  Omni Eye Specialists  Eye Doctors of Washington  Omni Eye Specialists  Eye Doctors of Washington  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 Severn, 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 Severn
Nearby Severn Hospitals *St Mary's Hospital Calvert Memorial Hospital Riverside Tappahannock Hospital Rappahannock General Hospital Civista Medical Center Eastern Shore Hospital Center 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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