Electroretinography Center - Covina, CA
Covina 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 Covina * Atlantis Eye Care  Atlantis Eye Care  Dualan & Frey MDs  Magan Medical Clinic  Foothill Eye Surgical Center  Kurwa Eye Center  York Laser Eye Medical  California Eye Specialists  California Eye Specialists  California Eye Specialists  California Eye Specialists  Peter T Chen MD  Glen Jarus MD  I Q Laser Vision  Susie Y Wong  OIC Eye Group  Ocular Surgery Medical Associates  Ocular Surgery Medical Associates  Jose C Briones Jr. MD  Garlan Lo MD  Wayne Martin MD  Dennis Chuck MD  California Laser Eye Associates  NuVision Laser  Randolph J Falk MD  Mark H Barak MD  El Monte Eye Clinic  Jan S Lukac MD  Arcadia Eye Center  Doheny Eye Center Arcadia  Southern California Eye Care  Doheny Eye Center Arcadia  Doheny Eye Center Arcadia  Phillips Eye Center  Phillips Eye Center  David Marshburn DO  John S Marshburn MD  Vision Care Network  William N May MD  Frederick Raymond MD  Nicholas Kokoris MD & Associates  Nicholas Kokoris MD & Associates  Claremont Eye Associates  Claremont Eye Associates  Claremont Eye Associates  Dai Le Tran MD  Retina Consultants of Orange County  Sam Goldberger MD  Retina Consultants of Orange County  Lingua Vision Surgical Group  John D Zdral MD John Esser MD  Roger Chan MD  J Nickolas Berbos MD  Fullerton Eye Medical Center  William Mosier MD  Robert A Innocenzi MD  Montebello Eye Center  Montebello Eye Center  San Gabriel Eye Associates  Retina Eye Specialists  San Gabriel Eye Associates  Jeffrey V Winston MD  Jeffrey V Winston MD  William Ko MD  Chang Eye Clinic  Nazareth E Darakjian MD  Quon Medical Center  Ted Wei MD  Kevin T Wong MD  Kevin T Wong MD  Lo Medical Group  Sally I Kim MD  Dik Cheung MD  Hyong S Choe MD  Grace Liu MD  Agape Eye Associates  Almira Cann MD  Mitchell Latter MD Inc  De La Pena Eye Clinic  Michael J Miller MD  Karen Morgan MD  Calvin T Eng MD  Warren C Stout MD  Warren C Stout MD  Paul T Urrea MD  Childrens Eye Institute  Childrens Eye Institute  Atlantis Eyecare  Pacific Eye Institute  Pacific Eye Institute  Pacific Eye Institute  Pacific Eye Institute  Pacific Eye Institute  Carl S Shibata MD  Pacific Eye Institute  Southern California Glaucoma Consultants  Ophthalmology Corporation  Pasadena Eye Medical Group  Eyesthetica  Jeffrey C Hong MD Covina, CaliforniaUpcoming Local Events2012-06-10
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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 Covina
Nearby Covina Hospitals *Citrus Valley Medical Center Inter Community Campus Aurora Charter Oak Hospital Kindred Hospital San Gabriel Valley East Valley Hospital Medical Center San Dimas Community Hospital Foothill Presbyterian Hospital Doctor's Hospital West Covina Citrus Valley Medical Center Queen of the Valley Campus Vista Specialty Hospital of San Gabriel Valley City of Hope National Medical Center Kaiser Permanente Medical Center Baldwin Park Pomona Valley Hospital Medical Center Casa Colina Centers for Rehabilitation Greater El Monte Community Hospital Methodist Hospital BHC Alhambra Hospital Kindred Hospital Brea Montclair Hospital Medical Center Whittier Hospital Medical Center Aurora Las Encinas Hospital Presbyterian Intercommunity Hospital Chino Valley Medical Center San Gabriel Valley Medical Center City of Angels Medical Center Ingleside Campus Beverly Hospital Garfield Medical Center St Jude Medical Center Kindred Hospital La Mirada Kindred Hospital Ontario Placentia-Linda Hospital San Antonio Community Hospital Monterey Park Hospital Alhambra Hospital Medical Center Metropolitan State Hospital Huntington Hospital Norwalk Community Hospital Kaiser Permanente Anaheim Medical Center Anaheim Regional Medical Center Coast Plaza Doctors Hospital Downey Regional Medical Center East Los Angeles Doctors Hospital Los Angeles Community Hospital USC University Hospital Kaiser Permanente Downey Medical Center USC Norris Comprehensive Cancer Center LAC + USC Medical Center LAC + USC Medical Center Women's & Children's Hospital Rancho Specialty Hospital Western Medical Center Anaheim College Hospital Cerritos La Palma Intercommunity Hospital Promise Hospital of East Los Angeles Rancho Los Amigos National Rehabilitation Center White Memorial Medical Center West Anaheim Medical Center Anaheim General Hospital Glendale Adventist Medical Center Pacific Alliance Medical Center Bellflower Medical Center Kaiser Mental Health Center Community Hospital of Huntington Park Verdugo Hills Hospital Barlow Respiratory Hospital University Of California Irvine Medical Center Tri-City Regional Medical Center Chapman Medical Center Gateways Hospital & Mental Health Center Promise Hospital of East Los Angeles Suburban Medical Center Campus St Francis Medical Center St Joseph Hospital Children's Hospital Orange County HealthBridge Children's Rehabilitation Hospital Glendale Memorial Hospital & Health Center Good Samaritan Hospital Lakewood Regional Medical 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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