Electroretinography Center - Petaluma, CA
Petaluma 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 Petaluma * Roger D. Weeks, MD  Randall Chapman MD  Robert A Yohai MD  Paul F Campion MD  Drs Dixon & Raaka  Drs Dixon & Raaka  Eye Care Institute  Eye Care Institute  Eye Care Institute  Eye Care Institute  Eye Institute of Marin  MarinEyes (Marin Ophthalmic Consultants)  MarinEyes (Marin Ophthalmic Consultants)  MarinEyes (Marin Ophthalmic Consultants)  Gregg S Gayre MD  A Alan Weber MD  Robert Anderson MD  Shimokaji & Shapiro MDs  Edward E Feldman MD  Summerfield Optical  Bruce D Gaynor MD  Summerfield Optical  Empire Eye Doctors  Empire Eye Doctors  North Bay Eye Associates  North Bay Eye Associates  Eye Associates of Sebastopol  Eye Associates of Sebastopol  LaserVue Eye Center  Retina Consultants  Retina Consultants  Retina Consultants  Retina Consultants  Eye Care Center  The Eye Specialist Medical Group  Eye Care Center  The Eye Specialist Medical Group  Paul Row MD  Julie M Perry MD  Kaiser Medical Center in Richmond Pediatrics  Kaiser Medical Center in Richmond Pediatrics  Barry E Breaux MD  Elliot S Eisenberg MD  Paul H Ryan MD  Newman Lasik Centers  Redwood Eye Center  Redwood Eye Center  Ellis Eye & Laser Medical Centers  East Bay Eye Center  St Francis Ophthalmology Group  Dilys J Bart MD  Steven N Cohen MD  J Brooks Crawford MD  Marc P Cruciger MD  Michael Turan MD  Denny Eye & Laser Center  Pacific Eye Associates  Pacific Eye Associates  Pacific Eye Associates  Day & Good MDs  Pacific Eye Associates  Pacific Eye Associates  Day & Good MDs  Pacific Eye Associates  Pacific Eye Associates  Suzanne G Li MD  Pacific Eye Associates  Pacific Eye Associates  Pacific Eye Associates  Pacific Eye Associates  Alan B Scott MD  Pacific Eye Associates  Rona Z Silkiss MD  Pacific Eye Associates  Pacific Eye Specialists CPMC  Pacific Eye Specialists CPMC  Pacific Eye Specialists CPMC  Pacific Eye Specialists CPMC  M David Thier MD  Daniel F Goodman Medical Group Inc  Glaucoma Specialists  Glaucoma Specialists  Ervin P Wong MD  L Eric Leung MD  David S Yee MD  Gary L Aguilar MD  Pacific Vision Institute  Pacific Vision Institute  Optima Ophthalmic Medical Associates Inc  Melvyn D Bert MD FACS  Eye Care Associates of San Francisco  Eye Care Associates of San Francisco  Eye Care Associates of San Francisco  Lillie A Mosaddegh MD  Ze Woong Yang MD  Dean R Hirabayashi MD  Glaucoma Center of San Francisco  Glaucoma Center of San Francisco  Glaucoma Center of San Francisco  Glaucoma Center of San Francisco Petaluma, CaliforniaUpcoming Local Events2012-06-16
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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 Petaluma
Nearby Petaluma Hospitals *Petaluma Valley Hospital Novato Community Hospital Sonoma Valley Hospital Kaiser Permanente San Rafael Medical Center Kentfield Rehabilitation & Specialty Hospital Marin General Hospital Napa State Hospital Queen of the Valley Medical Center Santa Rosa Memorial Hospital Main Campus Palm Drive Hospital Kaiser Permanente Vallejo Medical Center St Helena Hospital Center for Behavioral Health Sutter Solano Medical Center Sutter Medical Center of Santa Rosa Chanate Campus Kaiser Permanente Santa Rosa Medical Center Doctor's Medical Center San Pablo St Helena Hospital Contra Costa Regional Medical Center Telecare Solano Psychiatric Health Facility Alta Bates Summit Medical Center Herrick Campus San Francisco VA Medical Center California Pacific Medical Center California Campus California Pacific Medical Center East Campus California Pacific Medical Center Pacific Campus Chinese Hospital UCSF Medical Center at Mount Zion VA Northern CA Healthcare System at Martinez Alta Bates Summit Medical Center Alta Bates Campus Kaiser Permanente San Francisco Medical Center Saint Francis Memorial Hospital NorthBay Medical Center St Mary's Medical Center Children's Hospital & Research Center Oakland California Pacific Medical Center Davies Campus UCSF Medical Center at Parnassus Alta Bates Summit Medical Center Summit Campus Kaiser Permanente Medical Center at Oakland Laguna Honda Hospital & Rehabilitation Center San Francisco General Hospital St Luke's Hospital John Muir Behavioral Health Center Alameda County Medical Center Highland Campus John Muir Medical Center Concord Campus Healdsburg District Hospital Alameda 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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