Electroretinography Center - Roanoke, VA
Roanoke 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 Roanoke * Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Blue Ridge Eye Center  Lewis-Gale Clinic Valley View Medical Center  Lewis-Gale Physicians Ophthalmology  Eye Care & Surgery  Eye Care & Surgery  Eye Care & Surgery  Vistar Eye Center  Vistar Eye Center  Vistar Eye Center  Woodroof Eye Center  David J Hedges MD  Daniel Drysdale MD  Sankar Mays & Butler MDs  Sankar Mays & Butler MDs  Sankar Mays & Butler MDs  NRV Eye Center  J Stephen Hudgins MD  Eye Physicians Martinsville  Eye Physicians Martinsville  Shaw Laser Eye  William W Mears MD  Piedmont Eye Center  Piedmont Eye Center  Piedmont Eye Center  Piedmont Eye Center  Piedmont Eye Center  Piedmont Eye Center  New River Valley Eye Center  Piedmont Regional Eye Center  Dominion Eye Center  Dominion Eye Center  Dominion Eye Center  Danville Eye Center  Halifax Eye Care Center  Augusta Eye Associates  Augusta Eye Associates PLC  Augusta Eye Associates PLC  Augusta Eye Associates PLC  John A Stathos Jr. MD  Augusta Eye Associates Roanoke, VirginiaUpcoming Local Events2012-05-28
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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 Roanoke
Nearby Roanoke Hospitals *Carilion Roanoke Community Hospital Carilion Roanoke Memorial Hospital Salem VA Medical Center Lewis-Gale Medical Center Mount Regis Center Catawba Hospital Carilion Franklin Memorial Hospital Bedford Memorial Hospital Montgomery Regional Hospital Carilion New River Valley Medical Center Carilion Saint Albans Behavioral Health 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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