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This is fortunately a pretty rare condition, however, there has been much research in this area. There has been alot of gene research into this disease and this can be found in the medical literature. Of clinical importance, there has been some articles relating to high dose vitamins, but it is my understanding that this has not shown any definite long term benefits. This is somewhat controversial. Cataracts are more
commonCommon cold in RP and this is a very successful surgery if necessary. There has also been some studies evaluating certain medications in those patients who suffer from another retinal condition associated with this disease called cystoid macular edema. Unfortunately, for most people with RP, there has not been any major breakthroughs. In this families case, it sounds as though the son has suffered moderate amount of vision loss for a young age. It is certainly important that they are connected to a low vision specialist to help him and work with him as he is likely to lose more peripheral vision. Your retinal specialist should be able to point you in the right direction.
Good luck. This information is provided for medical educational purposes only.
Sincerely,
HFHS M.D.-JL