Electroretinography Center - Lancaster, PA
Lancaster 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 Lancaster * Justin L Cappiello MD  Ophthalmological Associates of Lancaster  Eye Associates Of Lancaster Ltd  Eye Associates Of Lancaster Ltd  Eye Associates Of Lancaster Ltd  Eye Associates Of Lancaster Ltd  Eye Group of Lancaster County Ltd  Jeffrey H Chaby DO  Eye Health Physicians of Lancaster  Eye Physicians of Lancaster  Campus Eye Center  Family Eye Group  Family Eye Group  Family Eye Group  Family Eye Group  Campus Eye Center  Roy D Brod MD  Campus Eye Center  Central Pennsylvania Eye Institute  Family Eye Group  Eve Care Group of Lancaster  Persila V Mertz MD  Lebanon Ophthalmic Associates  Fava & Maria Eye Associates  Fava & Maria Eye Associates  David L Streisfeld MD  Dr Albert Alley & Associates  Dr Albert Alley & Associates  Bouquet Mulligan & DeMaio Eye Professionals  David J Bene MD  East York Eye Specialists  Carl A Frankel MD  Jacques L Surer Jr. DO  Elmwood Eye Center  Alan L Robin MD  The Retina Care Center  The Retina Care Center  Ophthalmology Associates of York LLP  Ophthalmology Associates of York LLP  Ophthalmology Associates of York LLP  Campanella & Pearah Eye Care Associates  Campanella & Pearah Eye Care Associates  Campanella & Pearah Eye Care Associates  Christianne A Schoedel MD  Christianne A Schoedel MD  Hershey Pediatric Ophthalmology Associates PC  Penn State Ophthalmology  Penn State Ophthalmology  Penn State Ophthalmology  Stuart H Goldberg MD  Penn State Ophthalmology  Penn State Ophthalmology  Penn State Ophthalmology  Penn State Ophthalmology  Penn State Ophthalmology  Penn State Ophthalmology  Penn State Ophthalmology  McHenry-Eskridge Associates  Apple Hill Eye Center  Carim Eye & Retina Center Ltd  Carim Eye & Retina Center Ltd  Carim Eye & Retina Center Ltd  Progressive Vision Institute Eye Care Center  Progressive Vision Institute Eye Care Center  Progressive Vision Institute Eye Care Center  Progressive Vision Institute Eye Care Center  Progressive Vision Institute Eye Care Center  Christina M Ohnsman MD  Berks Eye Physicians & Surgeons Ltd  Berks Eye Physicians & Surgeons Ltd  Berks Eye Physicians & Surgeons Ltd  Berks Eye Physicians & Surgeons Ltd  Eye Consultants of Pennsylvania  Eye Consultants of Pennsylvania  Eye Consultants of Pennsylvania  Eye Consultants of Pennsylvania  Eye Consultants of Pennsylvania  Eye Consultants of Pennsylvania  Arthur B Belson MD  Carty Eye Associates  Eyes of York  Eyes of York  James W Judge MD  Levin & Luminais Eye Associates  Levin & Luminais Eye Associates  Oculoplastic Consultants of Central Pennsylvania  Oculoplastic Consultants of Central Pennsylvania  Memorial Eye Institute  Memorial Eye Institute  Memorial Eye Institute  Premier Eye Care Group Inc  Premier Eye Care Group Inc  Premier Eye Care Group Inc  Elena R Farrell DO  Schein Ernst Eye Associates  Schein Ernst Eye Associates  Schein Ernst Eye Associates  Premier Eye Care Group Inc  Dailey Harvey Eye Associates  Dailey Harvey Eye Associates Lancaster, PennsylvaniaUpcoming 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 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 Lancaster
Nearby Lancaster Hospitals *Lancaster General Hospital Lancaster Regional Medical Center Lancaster General Women & Babies Hospital Lancaster Rehabilitation Hospital Heart of Lancaster Regional Medical Center Ephrata Community Hospital Lebanon VA Medical Center The Good Samaritan Hospital Memorial Hospital Philhaven Wernersville State Hospital York Hospital Penn State Children's Hospital Penn State Hershey Medical Center HEALTHSOUTH Rehabilitation Hospital of York HEALTHSOUTH Reading Rehabilitation Hospital Jennersville Regional Hospital Coatesville VA Medical Center Brandywine Hospital The Reading Hospital & Medical Center St Joseph Medical Center Community General Osteopathic Hospital Pinnacle Health Helen M Simpson Rehabilitation Hospital Saint John Vianney Hospital Harrisburg Hospital Upper Chesapeake 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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