Electroretinography Center - Sunnyvale, CA
Sunnyvale 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 Sunnyvale * South Bay Retina Inc  Silicon Valley Physicians  Camino Medical Group  Camino Medical Group  Camino Medical Group  Camino Medical Group  Camino Medical Group  N CA Retina Vitreous Associates Inc  N CA Retina Vitreous Associates Inc  Carey Vision Medical Group  N CA Retina Vitreous Associates Inc  N CA Retina Vitreous Associates Inc  N CA Retina Vitreous Associates Inc  N CA Retina Vitreous Associates Inc  LaserVue Eye Center  Drs Beers Shakinian & Volpicelli  Drs Beers Shakinian & Volpicelli  Drs Beers Shakinian & Volpicelli  Altos Eye Physicians  Cockerham Eye Consultants  Altos Eye Physicians  Altos Eye Physicians  Laser Eye Center of Silicon Valley  Spectrum Eye Physicians  Spectrum Eye Physicians  Spectrum Eye Physicians  Gregory H Phan MD  Optima Ophthalmic Medical Associates Inc  Randal T Pham MD  Carey Vision Medical Group  Winchester Optometry  Khoa Nguyen MD  Peter J Rutti MD  Joseph A Eliason MD  Eye Medical Clinic  Eye Medical Clinic  Eye Medical Clinic  Retinal Diagnostic Center  Retinal Diagnostic Center  Retinal Diagnostic Center  Palo Alto Medical Clinic Ophthalmology  Palo Alto Medical Clinic Ophthalmology  Palo Alto Medical Clinic Ophthalmology  Palo Alto Medical Clinic Ophthalmology  Palo Alto Medical Clinic Ophthalmology  Palo Alto Medical Clinic Ophthalmology  Palo Alto Medical Clinic Ophthalmology  John W Duggan MD  Donald Y Lesser MD  Edward J Saub MD  Stanford Eye Clinic  Stanford Eye Clinic  Stanford Eye Clinic  David Silverstein MD  Stanford Eye Clinic  Stanford Eye Clinic  Tony G Andrews MD & Christine E Langell MD  Arthur A Basham MD  Spectrum Eye Physicians  Spectrum Eye Physicians  Mid Peninsula Ophthalmology  Mid Peninsula Ophthalmology  Tony G Andrews MD & Christine E Langell MD  Mid Peninsula Ophthalmology  Mid Peninsula Ophthalmology  Krikor Barsoumian MD Inc  Beth Green MD  Medical & Surgical Vision Care  Claudio S Contreras MD Inc  San Jose Eye Institute  San Jose Eye Institute  California Vitreoretinal Center  Sonja S Declercq MD  California Vitreoretinal Center  California Vitreoretinal Center  California Vitreoretinal Center  California Vitreoretinal Center  Menlo Medical Clinic  Robert C Black MD  Palo Alto Medical Foundation Fremont Center  Timothy T Wang MD  San Jose Medical Group  San Jose Medical Group  Ngoc Nguyen MD  Raghunand Sastry MD  Kenneth C Low MD APC  Kenneth C Low MD APC  Kenneth C Low MD APC  Rona Z Silkiss MD  Singer Cohn & Catmzaro MDs  Singer Cohn & Catmzaro MDs  East Bay Retina Consultants  East Bay Retina Consultants  East Bay Retina Consultants  Maskeen Sabharwal MD  James J Song MD  Fang Tan MD  Mission Valley Medical Eye Center  Tearse Eye Center  Tearse Eye Center Sunnyvale, 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 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 Sunnyvale
Nearby Sunnyvale Hospitals *El Camino Hospital Kaiser Permanente Santa Clara Medical Center VA Palo Alto Health Care System O'Connor Hospital Santa Clara Valley Medical Center El Camino Hospital of Los Gatos Lucile Packard Children's Hospital Stanford Hospital & Clinics Menlo Park Surgical Hospital Good Samaritan Hospital San Jose Good Samaritan Hospital Mission Oaks Regional Medical Center of San Jose Fremont Hospital Kaiser Permanente Redwood City Medical Center Washington Hospital Sequoia Hospital Kaiser Permanente San Jose Medical Center Kaiser Permanente Hayward Medical Center San Mateo Medical Center St Rose Hospital Mills Hospital Eden Medical Center Mills-Peninsula Health Services Livermore Division of the VA Palo Alto Healthcare System Alameda County Medical Center Fairmont Campus John George Psychiatric Pavilion ValleyCare Health System Pleasanton San Leandro Hospital Kindred Hospital San Francisco Bay Area Valley Memorial Hospital Dominican Hospital Sutter Maternity & Surgery Center Seton Medical Center Coastside San Ramon Regional Medical Center Alameda Hospital Kaiser Permanente South San Francisco Medical Center Alameda County Medical Center Highland Campus Seton Medical Center Alta Bates Summit Medical Center Summit Campus San Francisco General Hospital St Luke's Hospital Watsonville Community Hospital Kaiser Permanente Medical Center at Oakland Children's Hospital & Research Center Oakland Saint Louise Regional Hospital Laguna Honda Hospital & Rehabilitation Center California Pacific Medical Center Davies 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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