The following percentages were noted in the various categories of patients tested. They concluded that the results of the ERG confirmed that the chance for improvement or stabilization of the disease process depends on the stage of the disease that the patient has at the initial time of therapy. The earlier the stage of the process of the treatment is begun, the better results are obtained. The results of the study, however, indicate that even in the late stages of the disease, sometimes there could be an improvement of the visual system after treatment. According to their investigations, the positive results lasted approximately six to eight months and it was felt that the condition would deteriorate if further administration of the extract was not administered.
Some patients can even get a spontaneous remission without receiving any therapy at all.
Because of this, patients undergoing therapy must be under control for long periods of time and this way it possibly can be determined which patients are undergoing spontaneous remission and which patients are stabilizing or improving as a result of the treatment. For this reason, a very long term follow-up is mandatory. One group of 25 consecutive patients were studied systematically for three to five years. These patients were shown to maintain a higher level of measured responses for the full three to five years as long as they were receiving the extract. It was projected based on general population with this disorder that steady deterioration would have occurred in patients not receiving this extract.