Electroretinography Center - Hesperia, CA
Hesperia 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 Hesperia * Valdez Eye Center  Eye Center  Edward J Puttre MD  Robert S Herrick MD  Inland Eye Institute  Inland Eye Institute  Inland Eye Institute  LLUHC Ophthalmology  LLUHC Ophthalmology  LLUHC Ophthalmology  LLUHC Ophthalmology  LLUHC Ophthalmology  LLUHC Ophthalmology  LLUHC Ophthalmology  LLUHC Ophthalmology  Retina Consultants of Southern California  Donald Shearer MD  Beaver Medical Group Redlands  Beaver Medical Group Redlands  Beaver Medical Group Redlands  Pacific Eye Institute  Pacific Eye Institute  Doheny Eye Center  Pacific Eye Institute  Doheny Eye Center  Pabalan Eye Center  Pacific Eye Institute  Pacific Eye Institute  Carl S Shibata MD  Pacific Eye Institute  Riverside Eye Specialists  Childrens Eye Institute  Riverside Eye Specialists  Riverside Eye Specialists  Childrens Eye Institute  David R McGrew MD  Riverside Medical Clinic  Riverside Medical Clinic  Retina Consultants of Southern California  Claremont Eye Associates  Claremont Eye Associates  Claremont Eye Associates  Mark H Barak MD  Robert A Innocenzi MD  California Laser Eye Associates  Dennis Chuck MD  Cheung S Wan MD  Tri-County Eye Institute  Inland Valley Retina Medical Associates Inc  Khanna Institute of Lasik  Inland Valley Retina Medical Associates Inc  Inland Valley Retina Medical Associates Inc  Jose C Briones Jr. MD  A M Palanca-Capistrano MD Inc  California Eye Specialists  California Eye Specialists  California Eye Specialists  California Eye Specialists  Foothill Eye Surgical Center  Kurwa Eye Center  York Laser Eye Medical  Wayne Martin MD  Atlantis Eye Care  Atlantis Eye Care  Dualan & Frey MDs  Magan Medical Clinic  John D Zdral MD John Esser MD  Ocular Surgery Medical Associates  Ocular Surgery Medical Associates  I Q Laser Vision  Susie Y Wong  Peter T Chen MD  Glen Jarus MD  OIC Eye Group  Arthur D Charap MD  Vision Care Network  John S Marshburn MD  Garlan Lo MD  NuVision Laser  Hemet Eye Medical & Surgical Center  Jan S Lukac MD  California Eye Professionals  California Eye Professionals  Phillips Eye Center  Phillips Eye Center  Arcadia Eye Center  Doheny Eye Center Arcadia  Doheny Eye Center Arcadia  Doheny Eye Center Arcadia  Randolph J Falk MD  El Monte Eye Clinic  Chien Ko Wu & Meei Ling Wu MDs  Retina Consultants of Orange County  Southern California Eye Care  Sam Goldberger MD  Retina Consultants of Orange County  Lingua Vision Surgical Group  J Nickolas Berbos MD  Fullerton Eye Medical Center  William Mosier MD Hesperia, 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 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 Hesperia
Nearby Hesperia Hospitals *Desert Valley Hospital Victor Valley Community Hospital St Mary Medical Center Mountains Community Hospital Community Hospital of San Bernardino St Bernardine Medical Center Robert H Ballard Rehabilitation Hospital Patton State Hospital Arrowhead Regional Medical Center Kaiser Permanente Fontana Medical Center Loma Linda University Children's Hospital Loma Linda University Medical Center VA Loma Linda Healthcare System Loma Linda University Medical Center East Campus Rancho Specialty Hospital Loma Linda University Behavioral Medicine Center Bear Valley Community Hospital Redlands Community Hospital San Antonio Community Hospital Kindred Hospital Ontario Riverside Community Hospital Montclair Hospital Medical Center Casa Colina Centers for Rehabilitation Pomona Valley Hospital Medical Center Chino Valley 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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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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