Electroretinography Center - San Marcos, TX
San Marcos 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 San Marcos * Central Texas Eye Center  Texan Eye Care  Peter H Broberg MD & Associates PA  Peter H Broberg MD & Associates PA  Central Texas Eye Center  Eye Associates  Fleming Eye Care  Eye Associates  Fleming Eye Care  New Braunfels Vision Center  David Way MD  W Darrell Willerson Jr. MD  Richard Briggs MD  Austin VA OP Clinic  South Austin Eye Clinic  Peter H Broberg MD & Associates PA  Howerton Eye Clinic  Howerton Eye Clinic  Texan Eye Care  Texan Eye Care  Texan Eye Care  Texan Eye Care  Texan Eye Care  Texan Eye Care  Provista Eye Clinic  Texan Eye Care  Westlake Eye Specialists  Westlake Eye Specialists  Austin Eye Clinic  Austin Eye Clinic  Peter J Speicher MD  Brian B Berger MD PA  Texas Oculoplastic Consultants  Austin Retina Associates  Austin Retina Associates  Glaucoma Institute  Austin Retina Associates  Austin Retina Associates  Glaucoma Institute  Texas Oculoplastic Consultants  Texas Oculoplastic Consultants  Texas Oculoplastic Consultants  O B Jackson Jr. MD  Childrens Eye Center  Childrens Eye Center  Quintin J Smith MD  Eye Physicians of Austin  Eye Physicians of Austin  Eye Physicians of Austin  Eye Physicians of Austin  Eye Physicians of Austin  Eye Physicians of Austin  Wendall C Bauman Jr. MD  Alamo City Eye  Alamo City Eye  Alamo City Eye  Alamo City Eye  Sam N Key III MD  Texan Eye Care  Eye Clinic of Austin  Medical Center Ophthalmology Associates  Medical Center Ophthalmology Associates  Medical Center Ophthalmology Associates  Medical Center Ophthalmology Associates  Medical Center Ophthalmology Associates  Eye Institute of Austin  Eye Institute of Austin  Eye Institute of Austin  Eye Institute of Austin  Eye Institute of Austin  Eye Institute of Austin  James G Kalpaxis MD  Eyes of Texas Laser Center  Robert A Laibovitz MD  Austin Pediatric Ophthalmology  B David Brent MD  B David Brent MD  Michelle Berger MD  Northwest Eye Clinic  Austin Diagnostic Clinic Opthalmology  Austin Diagnostic Clinic Opthalmology  Samuel J Pierce MD  David G Shulman MD PA  David G Shulman MD PA  Ophthalmology Associates San Antonio  Ophthalmology Associates San Antonio  Donald K Sanford MD  Ophthalmology Associates San Antonio  Donald Adams MD  Children's Eye Center  Martha C Wilson MD  North Central Ophthalmology  Nader G Iskander MD  Patrick S O'Connor MD  Patrick S O'Connor MD  Lynnell C Lowry MD  Eye Clinics of South Texas PA  Harrison Bowes MD  Miriam J Friedman MD  David I Tasker MD San Marcos, TexasUpcoming Local Events2012-06-02
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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 San Marcos
Nearby San Marcos Hospitals *Seton Edgar B Davis Memorial Hospital Warm Springs Specialty Hospital Luling Central Texas Medical Center Guadalupe Regional Medical Center Christus Santa Rosa New Braunfels Gonzales Memorial Hospital Texas NeuroRehab Center The Oaks Treatment Center Seton Southwest Healthcare Center St David's South Austin Hospital 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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