So, I was asked by Elijah who is raising CCI Dembre if I was learning about different causes of blindness in school. The answer to that Elijah is not right now. Someday, that might be a lot of fun. Right now though I'm just doing a study on RP because February is RP awareness month.
Retinitis Pigmentosa Fact #22
We already know that there are different gene mutations that can cause RP, but the disease can evolve differently in patients that have the exact same gene mutation. (source)