Electroretinography Center - Napa, CA
Napa 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 Napa * Drs Dixon & Raaka  Drs Dixon & Raaka  Julie M Perry MD  Eye Care Center  The Eye Specialist Medical Group  Eye Care Center  The Eye Specialist Medical Group  Paul Row MD  Roger D. Weeks, MD  Edward E Feldman MD  Summerfield Optical  Bruce D Gaynor MD  Summerfield Optical  Eye Care Institute  Eye Care Institute  Paul F Campion MD  Eye Care Institute  Eye Care Institute  Robert A Yohai MD  Empire Eye Doctors  Empire Eye Doctors  North Bay Eye Associates  LaserVue Eye Center  North Bay Eye Associates  Retina Consultants  Randall Chapman MD  Retina Consultants  Retina Consultants  Retina Consultants  Elliot S Eisenberg MD  Redwood Eye Center  Redwood Eye Center  Sutter Regional Medical Foundation Care Center  Eye Associates of Sebastopol  Eye Institute of Marin  Eye Associates of Sebastopol  Newman Lasik Centers  Barry E Breaux MD  Paul H Ryan MD  Advanced Eye Surgery  MarinEyes (Marin Ophthalmic Consultants)  MarinEyes (Marin Ophthalmic Consultants)  Gregg S Gayre MD  MarinEyes (Marin Ophthalmic Consultants)  Robert Anderson MD  Shimokaji & Shapiro MDs  A Alan Weber MD  Kaiser Medical Center in Richmond Pediatrics  Kaiser Medical Center in Richmond Pediatrics  Sutter Regional Medical Foundation Care Ctr  Gupta Etwaru MD  Retinal Consultants  Ellis Eye & Laser Medical Centers  Paul Rudolph Miller MD  Veterans Administration Outpatient Clinic  Veterans Administration Outpatient Clinic  East Bay Eye Center  Berkeley Ophthalmology Medical Group  Rose Shoshana Kiprov MD  Sorenson Ophthalmology  Sorenson Ophthalmology  Sorenson Ophthalmology  Amater Z Traylor Jr. MD  Clark S Tsai MD Inc  Eye Physicians of the East Bay  Lerner Eye Center  Children's Hospital Oakland  Lerner Eye Center  Contra Costa Eye Medical Center  Contra Costa Eye Medical Center  Contra Costa Eye Medical Center  North East Medical Service  North East Medical Service  St Francis Ophthalmology Group  East Bay Retina Consultants  East Bay Retina Consultants  East Bay Retina Consultants  Ervin P Wong MD  Kaiser Permanente Oakland Eye Care Services  Kaiser Permanente Oakland Ophthalmology  Kaiser Permanente Oakland Ophthalmology  Kaiser Permanente Oakland Ophthalmology  Kaiser Permanente Oakland Eye Care Services  Bay Area Retina Associates  Northern California Cornea Associates  Langham Lee & Horn MDs  Langham Lee & Horn MDs  Langham Lee & Horn MDs  Langham Lee & Horn MDs  Bay Area Retina Associates  L Eric Leung MD  Rona Z Silkiss MD  Northern California Cornea Associates  Bay Area Retina Associates  David S Yee MD  John C Alden MD  Day & Good MDs  Denny Eye & Laser Center  Day & Good MDs  Hubert Wong MD Napa, 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 Napa
Nearby Napa Hospitals *Sonoma Valley Hospital Queen of the Valley Medical Center Napa State Hospital St Helena Hospital Petaluma Valley Hospital Santa Rosa Memorial Hospital Main Campus Sutter Medical Center of Santa Rosa Chanate Campus Kaiser Permanente Santa Rosa Medical Center Kaiser Permanente Vallejo Medical Center Sutter Solano Medical Center Novato Community Hospital St Helena Hospital Center for Behavioral Health Palm Drive Hospital Telecare Solano Psychiatric Health Facility NorthBay Medical Center Kaiser Permanente San Rafael Medical Center VacaValley Hospital Doctor's Medical Center San Pablo Healdsburg District Hospital Kentfield Rehabilitation & Specialty Hospital Marin General Hospital Contra Costa Regional Medical Center VA Northern CA Healthcare System at Martinez John Muir Behavioral Health Center John Muir Medical Center Concord Campus 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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