Electroretinography Center - Manchester, NH
Manchester 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 Manchester * New Hampshire Eye Associates  New Hampshire Eye Associates  New Hampshire Eye Associates  Bellows Goodman Shaker & Siegal Medical Eye Center  Bellows Goodman Shaker & Siegal Medical Eye Center  Bellows Goodman Shaker & Siegal Medical Eye Center  Bellows Goodman Shaker & Siegal Medical Eye Center  Samuel C Gold MD  Retina Vision Center  Physicians Eye Center  Nutfield Eye Associates  Spindel Eye & Lasik Associates  Eye Center of Concord  Eye Center of Concord  Eye Center of Concord  Eye Center of Concord  Eye Center of Concord  Concord Eye Care & Laser Center PC  Concord Eye Care & Laser Center PC  Concord Eye Care & Laser Center PC  Concord Eye Care & Laser Center PC  Concord Eye Care & Laser Center PC  Concord Eye Care & Laser Center PC  Concord Eye Care & Laser Center PC  Nashua Eye Associates PA  Nashua Eye Associates PA  Nashua Eye Associates PA  Nashua Eye Associates PA  Nashua Eye Associates PA  Salem Ophthalmology  Tallman Eye Associates  Monadnock Eye Associates  Monadnock Eye Associates  Laconia Eye Associates  Laconia Eye Associates  P K Shetty MD  Melvyn Damast MD  Jay B Gooze MD  Eyesight Ophthalmic Services  Eyesight Ophthalmic Services  Thomas W Bennett MD  Cornea Consultants  Northeast Corneal Consultants PA  William M Marsh MD  Eyesight Ophthalmic Services  Eyesight Ophthalmic Services  Seacoast Eyecare  John S Richards MD PA  Lane Eye Associates & Green Mountain Optical  Dartmouth-Hitchcock Medical Center Ophthalmology  Dartmouth-Hitchcock Medical Center Ophthalmology  Dartmouth-Hitchcock Medical Center Ophthalmology  Dartmouth-Hitchcock Medical Center Ophthalmology  Dartmouth-Hitchcock Medical Center Ophthalmology  Dartmouth-Hitchcock Medical Center Ophthalmology  Dartmouth-Hitchcock Medical Center Ophthalmology  Ophthalmic Consultants of the Upper Valley  Anthony Iorfino MD  Eye Associates of Northern New England  Eye Associates of Northern New England  Eye Associates of Northern New England Manchester, New HampshireUpcoming 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 Manchester
Nearby Manchester Hospitals *Catholic Medical Center Elliot Hospital Manchester VA Medical Center Parkland Medical Center New Hampshire Hospital Concord Hospital HEALTHSOUTH Rehabilitation Hospital Southern New Hampshire Medical Center St Joseph Hospital Hampstead Hospital Northeast Rehabilitation Health Network Crotched Mountain Rehabilitation Center Caritas Holy Family Hospital and Medical Center HC Solomon Mental Health Center Lowell General Hospital Whittier Rehabilitation Hospital Haverhill Monadnock Community Hospital Lawrence General Hospital Saints Medical Center Merrimack Valley Hospital Exeter Hospital Isham Health Center Tewksbury Hospital Nashoba Valley Medical Center Baldpate Hospital Anna Jaques Hospital Health Alliance Burbank Hospital Franklin Regional Hospital Frisbie Memorial Hospital Wentworth-Douglass Hospital Portsmouth Regional Hospital HealthAlliance Hospital Leominster Campus 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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Usher Syndrome
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