Electroretinography Center - Philadelphia, PA
Philadelphia 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 Philadelphia * Joseph H Calhoun MD & Kammi B Gunton MD  Joseph H Calhoun MD & Kammi B Gunton MD  Hughes Center  Ophthalmic Partners of PA  Nevyas Eye Associates  Nevyas Eye Associates  Kremer Eye Center  Rittenhouse Eye Assoc  Donelson Manley MD  Accuvision Eye MD Care Group PC  Philadelphia Eye Associates  Philadelphia Eye Associates  Neuro-Ophalmologic Associates PC  Philadelphia Eye Associates  Mid Atlantic Retina  Annesley Fischer Flanagan Stefanyszyn & Associates  Corneal Associates PC At Wills Eye Institute  Annesley Fischer Flanagan Stefanyszyn & Associates  Neuro-Ophalmologic Associates PC  Corneal Associates PC At Wills Eye Institute  Ophthalmic Associates PC  Corneal Associates PC At Wills Eye Institute  Ophthalmic Associates PC  Annesley Fischer Flanagan Stefanyszyn & Associates  Corneal Associates PC At Wills Eye Institute  Neuro-Ophalmologic Associates PC  Neuro-Ophalmologic Associates PC  Ophthalmology Service  Ophthalmology Service  Annesley Fischer Flanagan Stefanyszyn & Associates  Mid Atlantic Retina  Society Hill Ophthalmic Associates  Society Hill Ophthalmic Associates  Kay & Tabas Ophthalmology  Kay & Tabas Ophthalmology  Kay & Tabas Ophthalmology  Kay & Tabas Ophthalmology  William Sun MD  Ophthalmology Center Ltd  Philadelphia Eye Associates  Philadelphia Eye Associates  Philadelphia Eye Associates  Schneider & Sivitz Associates  Schneider & Sivitz Associates  Schneider & Sivitz Associates  Scheie Eye Institute  Children's Hospital Philadelphia Ophthalmology  Scheie Eye Institute  Children's Hospital Philadelphia Ophthalmology  Scheie Eye Institute  Scheie Eye Institute  Scheie Eye Institute  Scheie Eye Institute  Children's Hospital Philadelphia Ophthalmology  Scheie Eye Institute  Scheie Eye Institute  Scheie Eye Institute  Children's Hospital Philadelphia Ophthalmology  Scheie Eye Institute  Scheie Eye Institute  Children's Hospital Philadelphia Ophthalmology  Scheie Eye Institute  Children's Hospital Philadelphia Ophthalmology  Scheie Eye Institute  Scheie Eye Institute  Scheie Eye Institute  Scheie Eye Institute  Keystone Eye Associates  Progressive Vision Institute Eye Care Center  Progressive Vision Institute Eye Care Center  Temple Ophthalmology Associates  Temple Ophthalmology Associates  Temple Ophthalmology Associates  Temple Ophthalmology Associates  St Christopher Pediatric Association Ophthalmology  Theresa K Reilly MD  Theresa K Reilly MD  Ophthalmic Partners of PA  Winston Bryant MD  Ophthalmic Partners of PA  Cohen & Swartz MDs  Ophthalmic Partners of PA  Ophthalmic Partners of PA  Ophthalmic Partners of PA  Ophthalmic Partners of PA  Russin Eye LLC  Ophthalmic Partners of PA  Cohen & Swartz MDs  Ophthalmic Partners of PA  Leslie Brown MD  Benjamin H Bloom MD  Bruce K Brownstein MD  Mid-Atlantic Retina  Mid-Atlantic Retina  Mid-Atlantic Retina  Nevyas Eye Associates  Nevyas Eye Associates  Nevyas Eye Associates  Nevyas Eye Associates  Nevyas Eye Associates Philadelphia, PennsylvaniaA commercial, educational, and cultural center, the city was once the second-largest in the British Empire (after London), and the social and geographical center of the original 13 American colonies. Ben Franklin took a large role in Philadelphia's early rise to prominence. It was in this city that many of the ideas, and subsequent actions, gave birth to the American Revolution and American Independence, making Philadelphia a centerpiece of early American history. It was the most populous city of the young United States, although by the first census in 1790, New York City had overtaken it. Philadelphia served as one of the nation's many capitals during the Revolutionary War and after. Following the ratification of the U.S. Constitution, it was the temporary national capital from 1790 to 1800 while Washington, DC was under construction. Upcoming 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 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 Philadelphia
Nearby Philadelphia Hospitals *Thomas Jefferson University Hospital Hahnemann University Hospital Magee Rehabilitation Hospital Wills Eye Hospital Pennsylvania Hospital St Joseph Hospital Children's Hospital of Philadelphia Hospital of the University of Pennsylvania Saint Agnes Medical Center Girard Medical Center Penn Presbyterian Medical Center Methodist Hospital Philadelphia VA Medical Center Kensington Hospital Cooper University Hospital Virtua Health Camden Mercy Hospital of Philadelphia Temple University Hospital Shriners Hospital for Children St Christopher's Hospital for Children Our Lady of Lourdes Medical Center Belmont Center for Comprehensive Treatment CTCA at Eastern Regional Medical Center Lankenau Hospital Kindred Hospital Delaware County Mercy Fitzgerald Hospital Roxborough Memorial Hospital Albert Einstein Medical Center Moss Rehabilitation Hospital Friends Hospital Frankford Hospital Frankford Delaware County Memorial Hospital Fairmount Behavioral Health System Kindred Hospital Philadelphia Underwood-Memorial Hospital Kennedy Health System Cherry Hill Campus Moss Rehabilitation Hospital Elkins Park Jeanes Hospital Chestnut Hill Hospital Montgomery Rehab Hospital of Chestnut Hill Fox Chase Cancer Center Bryn Mawr Hospital Nazareth Hospital Holy Redeemer Hospital & Medical Center Taylor Hospital Angela Jane Pavilion Rehabilitation Hospital Springfield Hospital Abington Memorial Hospital Kennedy Health System Stratford Campus Keystone Center Camden County Health Services Center Virtua Health Voorhees Aria Health Crozer-Chester Medical Center Brooke Glen Behavioral Hospital Marlton Rehabilitation Hospital Virtua West Jersey Hospital Marlton Weisman Children's Rehabilitation Hospital Horsham Clinic Community Hospital Montgomery Hospital Mercy Suburban Hospital Norristown State Hospital Kennedy Health System Washington Township Campus Lourdes Medical Center of Burlington County Montgomery County Emergency Service Abington Memorial Health Center Warminster Campus Riddle Memorial Hospital Hampton Behavioral Health Center Virtua West Jersey Hospital Berlin Valley Forge Medical Center & Hospital Paoli Hospital Devereux Beneto Children's Behavioral Health Center Eagleville Hospital Lower Bucks 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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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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