My brother used to have Retinitis pigmentosa disease. As this is a genetic disease and there is no cure for this eye disease. People should know how to decrease this at least. 
When he was born, he used to had this problem. He used to see less and sometimes felt like one eye blind. My parents were really anxious about this. They consulted with many doctors. But there was no solution to this. 
One day, a friend of my husband John visited us, he noticed everything and suggest us to go for stem cell therapy for this. We searched online a lot and had seen a very good review about this.
Later, we consulted with few firms and started doing his treatment from this year January. We tried retinitis pigmentosa treatment for him and now he is doing really well for the last few months.