Electroretinography Center - Merced, CA
Merced 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 Merced * Harold L Schick MD & Thomas M Weed MD  Harold L Schick MD & Thomas M Weed MD  Kenneth Grossman Ophthalmology  John K McGee MD  Sylvan Eye Associates  Graham Eye Clinic  Donaldson Eye Care Associates  Donaldson Eye Care Associates  Donaldson Eye Care Associates  Vision Care Center  Vision Care Center  Vision Care Center  Ning Lin MD  Rayna Piskova Chriqui MD  Robert Haymond MD  Northern California Eye Physicians  Northern California Eye Physicians  Kaiser Permanente Medical Center Ophthalmology  Stanislaus Eye Surgery  Stanislaus Eye Surgery  Stanislaus Eye Surgery  Stanislaus Eye Surgery  Stanislaus Eye Surgery  Eye Medical Center of Fresno  Fogg Maxwell Lanier & Remington Eye Care  Fogg Maxwell Lanier & Remington Eye Care  Fogg Maxwell Lanier & Remington Eye Care  Fogg Maxwell Lanier & Remington Eye Care  Eye Medical Center of Fresno  Lawrence Eye Associates  Fogg Maxwell Lanier & Remington Eye Care  Eye Medical Center of Fresno  Eye Medical Center of Fresno  Eye Medical Center of Fresno  Eye Medical Center of Fresno  Eye Medical Center of Fresno  Vision Care Center  Vision Care Center  Duane Y Nii MD  Valley Eye Institute  Retinal Consultants  J Allen Gammon MD  Sylvan Eye Associates  Sutter Gould Medical Foundation Eye Care Center  Sylvan Eye Associates  Sutter Gould Medical Foundation Eye Care Center  Sylvan Eye Associates  Modesto Eye Surgery  Sutter Gould Medical Foundation Eye Care Center  Zeiter Eye Clinic  Zeiter Eye Clinic  Zeiter Eye Clinic  Zeiter Eye Clinic  Retinal Consultants  Retinal Consultants  Heritage Eye Associates  Heritage Eye Associates  Heritage Eye Associates  Harold Hand MD  Kaiser Permanente Medical Center  Kaiser Stockton Ophthalmology  Kaiser Stockton Ophthalmology  Kaiser Stockton Ophthalmology  Kaiser Stockton Ophthalmology  Kaiser Permanente Medical Center  Kaiser Stockton Ophthalmology  Kaiser Stockton Ophthalmology  Kaiser Stockton Ophthalmology  Central Valley Eye & Laser Center  Kaiser Stockton Ophthalmology  Delta Eye Medical Group  Delta Eye Medical Group  Delta Eye Medical Group  Delta Eye Medical Group  Harland Langdon MD  Tracy Eye Care Medical Clinic  Jordan M Usunov MD  Delta Eye Medical Group  Kings Eye Center  Kings Eye Center  Cedar Eye Center Medical Group  Cedar Eye Center Medical Group  Cedar Eye Center Medical Group  Ronald E. Foltz, MD  N Parveen Sharma MD Merced, CaliforniaUpcoming Local Events2012-06-09
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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 Merced
Nearby Merced Hospitals *John C Fremont Healthcare District Mercy Medical Center Merced Chowchilla District Memorial Health District Tuolumne General Hospital Sonora 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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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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