Electroretinography (ERG) is an eye test used to detect abnormal function of the retina (the light-detecting portion of the eye).

Peep Algvere has written:

'Studies on the oscillatory potentials of the clinical electroretinogram' -- subject(s): Electroretinography

As RP is a genetic disorder, your doctor may do a number of tests to make sure that you are given the right treatment. They include:

• OCT or Optical Coherence Tomography, which is a test that takes highly detailed pictures of the retina
• Genetic Testing, where a blood sample or a tissue sample might be taken to study your genes to determine the extent of the disease as well as the course of action
• Electroretinography is a test that measures the electrical activity and checks the reaction of the Retina to light.
• Visual Field Testing helps check your peripheral vision and blind spots.

Every case of Retinitis Pigmentosa is different and doctors may want to do multiple tests to make sure they have caught the extent and severity of the disease.

Doctors at Sanjeevan Netralaya understand that every patient is different with different genes and understand the patient history before prescribing effective Ayurvedic Medication that is not only effective but also causes absolutely no side effects.

Retinitis pigmentosa (RP) begins with the loss of night vision. As things progress, peripheral vision will deteriorate resulting in tunnel vision. Vision will continue to deteriorate until an affected individual is legally blind. The only question is how fast this will occur. An eye care professional who administers a test called electroretinography (ERG) along with something to assess the dimensions of the visual field will be able to chart the course of the deterioration of vision. Naturally, the professional will have to perform the tests several times with an interval between tests. By mapping the test results, a curve can be constructed that makes some projections as to how fast vision is failing. Rates of progression vary, as one might expect. Look into a vitamin A supplement and spool up (get up to speed) on the particulars of this genetic condition. A posting here demonstrates computer and web access. Use the web. Support groups exist. If not local ones, they can be found on the net. Partner with a good medical professional if you don't have one so regular testing can be conducted and all your questions can be answered by an expert in the field. Best of luck sorting things out now and into the future. Use the link and skim the article posted by our friends at Wikipedia. Be sure to scroll down to the bottom and hit the links there. Quite a few are posted.