Electroretinography Center - Altadena, CA
Altadena 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 Altadena * Thomas Smith MD  Nazareth E Darakjian MD  Foothill Eye Surgical Center  Warren C Stout MD  Warren C Stout MD  Almira Cann MD  Michael J Miller MD  Karen Morgan MD  California Eye Specialists  California Eye Specialists  California Eye Specialists  Southern California Glaucoma Consultants  Ophthalmology Corporation  Pasadena Eye Medical Group  Eyesthetica  Jeffrey C Hong MD  Marta L Mora MD  Pasadena Eye Medical Group  Pasadena Eye Medical Group  Pasadena Eye Medical Group  Vitreo-Retinal Associates  Vitreo-Retinal Associates  Retina Eye Specialists  Alice Song MD Corp  Children's Retina Institute  Mitchell Latter MD Inc  William Ko MD  San Gabriel Eye Associates  San Gabriel Eye Associates  Beeve Vision Care Center  Beeve Vision Care Center  Dik Cheung MD  Jeffrey Nilles MD  Jeffrey Nilles MD  Quon Medical Center  Verdugo Eye Care  Phillips Eye Center  Kurwa Eye Center  Phillips Eye Center  Arcadia Eye Center  Doheny Eye Center Arcadia  Doheny Eye Center Arcadia  Doheny Eye Center Arcadia  Vision Care Medical Group  Vision Care Medical Group  Grace Liu MD  Chang Eye Clinic  Ted Wei MD  NuVision Laser  Kevin T Wong MD  Kevin T Wong MD  Agape Eye Associates  Lo Medical Group  OIC Eye Group  Carl S Shibata MD  Roger Chan MD  Albert Baktanian MD  Glendale Eye Medical Group  Glendale Eye Medical Group  Glendale Eye Medical Group  Glendale Eye Medical Group  Specialty Eye Care Medical Center Inc  Glendale Eye Medical Group  Glendale Eye Medical Group  Glendale Eye Medical Group  Calvin T Eng MD  Paul T Urrea MD  Dai Le Tran MD  Sahag A Baghdassarian MD  Sahag A Baghdassarian MD  Doheny Eye Institute Los Angeles  Doheny Eye Institute Los Angeles  Doheny Eye Institute Los Angeles  Doheny Eye Institute Los Angeles  Children's Hospital Los Angeles Ophthalmology  Stephen J Ryan MD  Doheny Eye Institute Los Angeles  Doheny Eye Institute Los Angeles  Ronald E Smith MD  Doheny Eye Institute Los Angeles  Doheny Eye Institute Los Angeles  Doheny Eye Institute Los Angeles  Randolph J Falk MD  El Monte Eye Clinic  Ocular Surgery Medical Associates  R Philip Doss MD  Ocular Surgery Medical Associates  Carl J Gordon MD  Hill Eye Center  White Memorial Medical Center  De La Pena Eye Clinic  Montebello Eye Center  Montebello Eye Center  Tsuyoshi Yamashita MD  Children's Hospital Los Angeles Ophthalmology  Children's Hospital Los Angeles Ophthalmology  Children's Hospital Los Angeles Ophthalmology  Children's Hospital Los Angeles Ophthalmology  Children's Hospital Los Angeles Ophthalmology  Children's Hospital Los Angeles Ophthalmology Altadena, 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 Altadena
Nearby Altadena Hospitals *Huntington Hospital Aurora Las Encinas Hospital Verdugo Hills Hospital San Gabriel Valley Medical Center Glendale Adventist Medical Center Methodist Hospital Alhambra Hospital Medical Center City of Angels Medical Center Ingleside Campus Garfield Medical Center Glendale Memorial Hospital & Health Center BHC Alhambra Hospital Monterey Park Hospital USC University Hospital USC Norris Comprehensive Cancer Center City of Hope National Medical Center LAC + USC Medical Center LAC + USC Medical Center Women's & Children's Hospital Gateways Hospital & Mental Health Center Barlow Respiratory Hospital Pacific Alliance Medical Center Kaiser Mental Health Center White Memorial Medical Center Greater El Monte Community Hospital Childrens Hospital Los Angeles Hollywood Presbyterian Medical Center Kaiser Permanente Los Angeles Medical Center Promise Hospital of East Los Angeles Providence Saint Joseph Medical Center East Los Angeles Doctors Hospital Temple Community Hospital St Vincent Medical Center Beverly Hospital Kaiser Permanente Medical Center Baldwin Park Good Samaritan Hospital Los Angeles Community Hospital Shriners Hospitals for Children Los Angeles Vista Specialty Hospital of San Gabriel Valley Hollywood Community Hospital California Hospital Medical Center Doctor's Hospital West Covina Orthopaedic Medical Center Citrus Valley Medical Center Queen of the Valley Campus Kindred Hospital San Gabriel Valley Los Angeles Metropolitan Medical Center Community Hospital of Huntington Park VA Greater Los Angeles HealthCare System Citrus Valley Medical Center Inter Community Campus Foothill Presbyterian Hospital East Valley Hospital Medical Center Pacifica Hospital of the Valley Olympia Medical Center Presbyterian Intercommunity Hospital Miracle Mile Medical Center Cedars-Sinai Medical Center Aurora Charter Oak Hospital Downey Regional Medical Center Kaiser Permanente West Los Angeles Medical Center Kaiser Permanente Panorama City Medical Center Whittier Hospital Medical Center Rancho Los Amigos National Rehabilitation Center Hollywood Community Hospital of Van Nuys San Dimas Community Hospital St Francis Medical Center Sherman Oaks Hospital Metropolitan State Hospital Kaiser Permanente Downey Medical Center Mission Community Hospital Brotman Medical Center Coast Plaza Doctors Hospital Valley Presbyterian Hospital Martin Luther King Jr MAC Service Center Norwalk Community Hospital Kindred Hospital Los Angeles Kindred Hospital La Mirada Ronald Reagan UCLA 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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