Electroretinography Center - Porterville, CA
Porterville 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 Porterville * Triangle Eye Institute  Wallace Ruminson MD  Joseph F Ruda MD  Kai Wong MD  Sierra Eye Group  Eye Surgical & Medical Associates  Eye Surgical & Medical Associates  Eye Surgical & Medical Associates  Visalia Eye Center  Visalia Eye Center  Gregory A Stainer MD  Central Valley Eye Care  Central Valley Eye Care  Richard Ling MD  Kings Eye Center  Empire Eye & Laser Center  Empire Eye & Laser Center  Kings Eye Center  Golden State Eye Center  California Retina Consultants  Empire Eye & Laser  Fritch Eye Care Medical Center  Ophthalmology Office  Vision Care Center  Vision Care Center  Vision Care Center  Duane Y Nii MD  Valley Eye Institute  Vision Care Center  Vision Care Center  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  Kaiser Permanente Medical Center Ophthalmology  Ning Lin MD  Rayna Piskova Chriqui MD  Ira E Opatowsky MD  Thomas K Reid MD Porterville, CaliforniaUpcoming Local Events2012-05-26
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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 Porterville
Nearby Porterville Hospitals *Sierra View District Hospital Porterville Developmental Center Tulare Regional Medical Center Kaweah Delta Medical Center Health District Delano Regional Medical Center Kaweah Delta Mental Health Hospital Kaweah Delta Rehabilitation Hospital Corcoran District 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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