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