Electroretinography Center - Lowell, MA
Lowell 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 Lowell * Massachusetts Eye Associates  Massachusetts Eye Associates  Massachusetts Eye Associates  Merrimack Eye Clinic  Massachusetts Eye Associates  Stephen J Poor III MD PC  Massachusetts Eye Associates  Family Eye Care Center  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Arrigg Eye & Ear Associates  Arrigg Eye & Ear Associates  Arrigg Eye & Ear Associates  Arrigg Eye & Ear Associates  Arrigg Eye & Ear Associates  Robert E Kellan MD  Macoul Eye Associates  Tallman Eye Associates  Tallman Eye Associates  Tallman Eye Associates  Tallman Eye Associates  Tallman Eye Associates  Tallman Eye Associates  Andover Eye Associates  Andover Eye Associates  Eye Associates PC  Eye Associates PC  Andover Eye Associates  Andover Eye Associates  Andover Eye Associates  Eye Associates PC  Andover Eye Associates  Eye Associates PC  Children's Hospital Boston Ophthalmology  Children's Hospital Boston Ophthalmology  Eye Associates PC  Eye Associates PC  Eye Associates PC  Lahey Clinic Medical Center Ophthalmology  Lahey Clinic Medical Center Ophthalmology  Lahey Clinic Medical Center Ophthalmology  Lahey Clinic Medical Center Ophthalmology  Lahey Clinic Medical Center Ophthalmology  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Lexington Eye Associates  Martin E Cutler MD  Martin E Cutler MD  D'Ambrosio Eye Care  D'Ambrosio Eye Care  D'Ambrosio Eye Care  Talamo Laser Eye Consultants  North Suburban Eye Associates  North Shore Ophthalmology  North Suburban Eye Associates  North Suburban Eye Associates  Cornea Consultants  Ophthalmic Consultants Of Boston  Ophthalmic Consultants Of Boston  Ophthalmic Consultants Of Boston  Ophthalmic Consultants Of Boston  American Vision Association  Valley Eye Physicians & Surgeons  Valley Eye Physicians & Surgeons  Valley Eye Physicians & Surgeons  Valley Eye Physicians & Surgeons  Glenn P Kimball Jr. MD  Children's Hospital Boston Ophthalmology  Children's Hospital Boston Ophthalmology  Dornfeld Eye Center  Putnoi Putnoi & Richler MDs  Putnoi Putnoi & Richler MDs  Putnoi Putnoi & Richler MDs  Miriam Dougherty MD  Ernst Meyer MD  Robert G Alexander MD  Horsley Eye Center  Ophthalmic Consultants Of Boston  Lahey Clinic Medical Center Ophthalmology  Lahey Clinic Medical Center Ophthalmology  Paul Barsam MD  Charles A Barsam MD  Stephen Youngwirth MD  Michael Olstein MD  Jason N Gilbert MD  Retina Specialists of Boston Inc  Retina Specialists of Boston Inc  North Shore Ophthalmology  Harvard Vanguard Medical Associates Somerville  Retina Specialists of Boston Inc  Harvard Vanguard Medical Associates Somerville  Larry Roth MD Lowell, MassachusettsUpcoming 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 Lowell
Nearby Lowell Hospitals *Saints Medical Center Lowell General Hospital HC Solomon Mental Health Center Tewksbury Hospital Isham Health Center Caritas Holy Family Hospital and Medical Center Lawrence General Hospital Edith Nourse Rogers Memorial Veterans Hospital Northeast Rehabilitation Health Network Southern New Hampshire Medical Center St Joseph Hospital Lahey Clinic Medical Center Emerson Hospital Nashoba Valley Medical Center HEALTHSOUTH New England Rehabilitation Hospital Whittier Rehabilitation Hospital Haverhill Merrimack Valley Hospital Winchester Hospital Baldpate Hospital Parkland Medical Center Hampstead Hospital Melrose Wakefield Hospital McLean Hospital Lawrence Memorial Hospital North Shore Medical Center Somerville Hospital Kindred Hospital Boston North Shore Mount Auburn Hospital Whidden Memorial Hospital Youville Hospital and Rehabilitation Center Cambridge Hospital Newton Wellesley Hospital Caritas St Elizabeth's Medical Center Franciscan Hospital for Children Lawrence F Quigley Memorial Hospital Kindred Hospital Boston Arbour HRI Hospital North Shore Children's Hospital Salem Hospital & the Birthplace Beverly Hospital M I T Medical Shaughnessy-Kaplan Rehabilitation Hospital Spaulding Rehabilitation Hospital Massachusetts General Hospital Massachusetts Eye & Ear Infirmary Shriners Hospitals for Children Boston Burn Hospital UMass Memorial Marlborough Hospital Beth Israel Deaconess Medical Center Children's Hospital Boston Dana Farber Cancer Institute Brigham & Women's Hospital HealthAlliance Hospital Leominster Campus Tufts New England Medical Center Elliot Hospital New England Baptist Hospital VA Boston Healthcare System Jamaica Plain Campus Anna Jaques Hospital UMass Memorial Clinton Hospital Boston Medical Center Arbour Hospital Health Alliance Burbank Hospital Kindred Specialty Hospital Natick MetroWest Medical Center Leonard Morse Hospital Radius Specialty Hospital Boston Bournewood Hospital Catholic Medical Center MetroWest Medical Center Framingham Union Hospital Faulkner Hospital Beth Israel Deaconess Hospital Needham Hebrew Rehabilitation Center for the Aged Lemuel Shattuck Hospital Manchester VA Medical Center Massachusetts Mental Health Center VA Boston Healthcare System West Roxbury Campus Westborough State 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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